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Javascript 中的 select发展史超强

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-12 浏览: 420 ::

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照片各部分的彩色与黑白交替更换无聊，写了个日历程序，欢迎拍砖

作者：marvellous
本文旨在大家对select和模拟select有一个全面地了解,使此项技术能发挥出更高的水平。
最初的select的确很平淡,就是一个下拉选项列表:

点击运行可以看到效果:
[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

日久天长之后,人们对select要求高了,要修一修边幅:

点击运行可以看到效果:

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

要加一些链接,变成菜单:

点击运行可以看到效果:

<STYLE>
body { cursor: url(http://vip.6to23.com/candylau/image/xiucursor.cur)}
</STYLE>
<style>
.select{border: 0 inset buttonface; width: 100; font: icon; cursor: default;}
.selected{border: 0 inset buttonface; background: window; padding: 0; font: icon;}
.selectTable{height: 100%; width: 100%;border: 2 inset buttonhighlight; background: buttonface;}
.option {font: icon; padding: 1; padding-left: 3; padding-right: 3; width: 100%;}
.dropDown{position: absolute; visibility: hidden; width: 100%;border: 1 solid windowtext; padding: 0;background: window;}
.select .button {width: 16px; height: 5; font-family: webdings; padding: 0;font-size: 11px; border: 2 outset buttonhighlight;}
</style>
<script type="text/javascript">
var overOptionCss = "background: highlight; color: highlighttext";
var sizedBorderCss = "2 inset buttonhighlight";
var globalSelect;
var ie4 = (document.all != null);
var q = 0;
function initSelectBox(el) { copySelected(el); var size = el.getAttribute("size"); el.options = el.children[1].children; el.selectedIndex = findSelected(el); el.remove = new Function("i", "int_remove(this,i)"); el.item = new Function("i", "return this.options[i]"); el.add = new Function("e", "i", "int_add(this, e, i)"); el.options[el.selectedIndex].selected = true; dropdown = el.children[1]; if (size != null) { if (size > 1) { el.size = size; dropdown.style.zIndex = 0; initSized(el); } else { el.size = 1; dropdown.style.zIndex = 99; if (dropdown.offsetHeight > 200) { dropdown.style.height = "200"; dropdown.style.overflow = "auto"; } } } highlightSelected(el,true);
}
function int_remove(el,i) { if (el.options[i] != null) el.options[i].outerHTML = "";
}
function int_add(el, e, i) { var html = "<div class='option' noWrap"; if (e.value != null) html += " value='" + e.value + "'"; if (e.style.cssText != null) html += " style='" + e.style.cssText + "'"; html += ">"; if (e.text != null) html += e.text; html += "</div>" if ((i == null) || (i >= el.options.length)) i = el.options.length-1; el.options[i].insertAdjacentHTML("AfterEnd", html);
}
function initSized(el) { var h = 0; el.children[0].style.display = "none"; dropdown = el.children[1]; dropdown.style.visibility = "visible"; if (dropdown.children.length > el.size) { dropdown.style.overflow = "auto"; for (var i=0; i<el.size; i++) { h += dropdown.children[i].offsetHeight; } if (dropdown.style.borderWidth != null) { dropdown.style.pixelHeight = h + 4; } else dropdown.style.height = h; } dropdown.style.border = sizedBorderCss; el.style.height = dropdown.style.pixelHeight;
}
function copySelected(el) { var selectedIndex = findSelected(el); selectedCell = el.children[0].rows[0].cells[0]; selectedDiv = el.children[1].children[selectedIndex]; selectedCell.innerHTML = selectedDiv.outerHTML;
}
function findSelected(el) { var selected = null; ec = el.children[1].children; var ecl = ec.length; for (var i=0; i<ecl; i++) { if (ec[i].getAttribute("selected") != null) { if (selected == null) { selected = i; } else ec[i].removeAttribute("selected"); } } if (selected == null) selected = 0; return selected;
}
function toggleDropDown(el) { if (el.size == 1) { dropDown = el.children[1]; if (dropDown.style.visibility == "") dropDown.style.visibility = "hidden"; if (dropDown.style.visibility == "hidden") showDropDown(dropDown); else hideDropDown(dropDown); }
}
function optionClick() { el = getReal(window.event.srcElement, "className", "option"); if (el.className == "option") { dropdown = el.parentElement; selectBox = dropdown.parentElement; oldSelected = dropdown.children[findSelected(selectBox)] if(oldSelected != el) { oldSelected.removeAttribute("selected"); el.setAttribute("selected", 1); selectBox.selectedIndex = findSelected(selectBox); } if (selectBox.onchange != null) { if (selectBox.id != "") { eval(selectBox.onchange.replace(/this/g, selectBox.id)); } else { globalSelect = selectBox; eval(selectBox.onchange.replace(/this/g, "globalSelect")); } } if (el.backupCss != null) el.style.cssText = el.backupCss; copySelected(selectBox); toggleDropDown(selectBox); highlightSelected(selectBox, true); }
}
function optionOver() { var toEl = getReal(window.event.toElement, "className", "option"); var fromEl = getReal(window.event.fromElement, "className", "option"); if (toEl == fromEl) return; var el = toEl; if (el.className == "option") { if (el.backupCss == null) el.backupCss = el.style.cssText; highlightSelected(el.parentElement.parentElement, false); el.style.cssText = el.backupCss + "; " + overOptionCss; this.highlighted = true; }
}
function optionOut() { var toEl = getReal(window.event.toElement, "className", "option"); var fromEl = getReal(window.event.fromElement, "className", "option"); if (fromEl == fromEl.parentElement.children[findSelected(fromEl.parentElement.parentElement)]) { if (toEl == null) return; if (toEl.className != "option") return; } if (toEl != null) { if (toEl.className != "option") { if (fromEl.className == "option") highlightSelected(fromEl.parentElement.parentElement, true); } } if (toEl == fromEl) return; var el = fromEl; if (el.className == "option") { if (el.backupCss != null) el.style.cssText = el.backupCss; }
}
function highlightSelected(el,add) { var selectedIndex = findSelected(el); selected = el.children[1].children[selectedIndex]; if (add) { if (selected.backupCss == null) selected.backupCss = selected.style.cssText; selected.style.cssText = selected.backupCss + "; " + overOptionCss; } else if (!add) { if (selected.backupCss != null) selected.style.cssText = selected.backupCss; }
}
function hideShownDropDowns() {
var el = getReal(window.event.srcElement, "className", "select");
var spans = document.all.tags("SPAN");
var selects = new Array();
var index = 0; for (var i=0; i<spans.length; i++) {
if ((spans[i].className == "select") && (spans[i] != el)) { ropdown = spans[i].children[1];
if ((spans[i].size == 1) && (dropdown.style.visibility == "visible")) selects[index++] = dropdown; }
}
for (var j=0; j<selects.length; j++) {
hideDropDown(selects[j]);
}
}
function hideDropDown(el) { if (typeof(fade) == "function") fade(el, false); else el.style.visibility = "hidden";
}
function showDropDown(el) { if (typeof(fade) == "function") fade(el, true); else if (typeof(swipe) == "function") swipe(el, 2); else el.style.visibility = "visible";
}
function initSelectBoxes() {
var spans = document.all.tags("SPAN");
var selects = new Array();
var index = 0;
for (var i=0; i<spans.length; i++) {
if (spans[i].className == "select")
selects[index++] = spans[i];
}
for (var j=0; j<selects.length; j++) {
initSelectBox(selects[j]);
}
}
function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
if (ie4) {
window.onload = initSelectBoxes;
document.onclick = hideShownDropDowns;
}
function writeSelectBox(matrix, id, size, onchange, css) { var d = window.document; var ie4 = (document.all != null); if (ie4) {
//alert("Before!");
var s = createIEString(matrix, id, size, onchange, css);
document.write(s);
//alert("After!");
}else
{
document.write(createXString(matrix, id, size, onchange, css));}
}
function createIEString(matrix, id, size, onchange, css) { var str = ""; str += '<span class="select"'; if (size == null) size = 1; str += ' size="' + size + '"'; if (id != null) str += ' id="' + id + '"'; if (onchange != null) str += ' onchange="' + onchange + '"'; if (css != null) str += ' style="' + css + '"'; str += '>\n'; str += '<table class="selectTable" cellspacing="0" cellpadding="0"\n'; str += ' onclick="toggleDropDown(this.parentElement)">\n'; str += '<tr>\n'; str += '<td class="selected"> </td>\n'; str += '<td align="CENTER" valign="MIDDLE" class="Button"\n'; str += ' onmousedown="this.style.border=\'2 inset buttonhighlight\'"\n'; str += ' onmouseup="this.style.border=\'2 outset buttonhighlight\'">\n'; str += '<span style="position: relative; left: 0; top: -2; width: 100%;">6</span></td>\n'; str += '</tr>\n'; str += '</table>\n'; str += '<div class="dropDown" onclick="optionClick()" onmouseover="optionOver()" onmouseout="optionOut()">\n'; for (var i=0; i<matrix.length; i++) { html = matrix[i].html; value = matrix[i].value; css = matrix[i].css; selected = matrix[i].selected; str += '<div class="option"'; if (value != null) str += ' value="' + value + '"'; if (css != null) str += ' style="' + css + '"'; if (selected != null) str += ' selected'; str += '>\n'; str += html; str += '</div>\n'; } str += '</div>\n'; str += '</span>\n'; return str;
}
function createXString(matrix, id, size, onchange, css) {
var str = '<form>\n';
str += '<select';
if (size == null) size = 1;
str += ' size="' + size + '"';
if (id != null) str += ' id="' + id + '"';
if (onchange != null) str += ' onchange="' + onchange + '"';
str += '>\n';
for (var i=0; i<matrix.length; i++) { html = matrix[i].html; value = matrix[i].value; css = matrix[i].css; selected = matrix[i].selected; str += '\n<option'; if (value != null) str += ' value="' + value + '"'; if (selected != null) str += ' selected'; str += '>'; str += stripTags(html); str += '</option>\n'; } str += '\n</select>\n'; str += '</form>\n';
return str;
}
function stripTags(str) { var s = 0; var e = -1; var r = ""; s = str.indexOf("<",e); do { r += str.substring(e + 1,s); e = str.indexOf(">",s); s = str.indexOf("<",e); } while ((s != -1) && (e != -1)) r += str.substring(e + 1,str.length); return r;
}
function Option(html, value, css, selected) { this.html = html; this.value = value; this.css = css; this.selected = selected;
}
</script>
<script type="text/javascript">
var optionArray = new Array();
optionArray[0] = new Option("Item 1", "value 1", "color: blue; text-decoration: underline;");
optionArray[1] = new Option("Item <b>2</b>", "value 2");
optionArray[2] = new Option("Item 3", "value 3", "color: red;", "selected");
optionArray[3] = new Option("Item 4", "value 4");
optionArray[4] = new Option("Item 5", "value 5");
writeSelectBox(optionArray, "select1", 1, "alert(this.options[this.selectedIndex].value)", "margin-left: 10;");
</script>
<script type="text/javascript">
writeSelectBox(optionArray, "select3", 3, "alert(this.options[this.selectedIndex].value)", "margin-left: 10;");
</script>
<select onchange="if(this.options[this.selectedIndex].value!=''){location=this.options[this.selectedIndex].value;}" >
<option value="http://www.163.com">网易</option>
<option value="http://www.google.com">google</option>
<option value="http://wwwsohu.com">搜狐</option>
</select>
<form>
<select size="1" name="D1" onchange=if(s=document.getElementById("S1")){s.style.backgroundColor=value}>
<option selected value="white">请选择颜色</option>
<option value="red">红色</option>
<option value="blue">蓝色</option>
<option value="green">绿色</option>
</select>
<textarea rows="20" name="S1" cols="35"></textarea>
</form>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

点击运行可以看到效果:

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

后来发展到其文字内容可以增、删、编、改，即可以编辑：

点击运行可以看到效果:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>EditSelect</title>
<script>
function isIE(){
a=navigator.appVersion.split(";")
b=a[1].split(" ")
return parseFloat(b[2])
}
if (isIE()<5.5)
{ scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><div id="selecthtml" class="selectcontent">selectáD表</div></div>'
}
else
{ scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><iframe id=selframe frameborder=0 height=100%></iframe><div id="selecthtml" class="selectcontent">selectáD表</div></div>'
}
document.write(scHTML)
vDiv=selectcontent
vDivHtml=selecthtml
function editselect(name,size,defaulttext,width,height,readonly){ var combo=this; this.options=new Array(); this.oj=new Array(); this.name=name; this.divname=name+'_div'; this.buttonname=name+'_button'; this.tablename=name+'_table'; this.htmltable=name+'_html' if (!height) this.height=0; else this.height=height if (width) this.width=width if (!size) size=8 if (!defaulttext) defaulttext="" if (!readonly || readonly==0) {readonly="" }else {if (readonly==1) readonly="readonly style=cursor:default";this.readonly=1} esHTML='<div id='+this.divname+'>' +'<table id='+this.tablename+' cellpadding=0 cellspacing=0 class=select><tr><td bgcolor=#FFFFFF>' +'<input type=text class=selecttext size="'+size+'" name='+name+' value="'+defaulttext+'" '+readonly+'><td><button class=selectbutton id='+this.buttonname+'>6</td></tr></table>' +'</div>' document.write(esHTML) this.sbutton=eval("document.all."+this.buttonname) if (this.readonly==1) eval("document.all."+this.name).onclick=function(){combo.show()} this.sbutton.onclick=function(){combo.show()} this.show=function(){ pDiv=eval(combo.divname) pTable=eval(combo.tablename) var vHTML='<table id=htmltable cellspacing="0" cellpadding="2" bgcolor="#ffffff" class="selecttable" width=100%>' for (i=0;i<combo.options.length;i++) { vHTML+='<tr onmouseover="mo(this)" onmouseout="mu(this)" onclick="document.all.'+combo.name+'.value=this.innerText;selectcontent.style.visibility=\'hidden\';'+combo.oj[i]+'"><td nowrap>'+combo.options[i] } vHTML+="</table>" vDivHtml.innerHTML=vHTML vtop=pDiv.offsetTop+pDiv.offsetHeight vleft=pDiv.offsetLeft+2 vParent = pDiv.offsetParent; while (vParent.tagName.toUpperCase() != "BODY") { vleft += vParent.offsetLeft; vtop += vParent.offsetTop; vParent = vParent.offsetParent; } var redge=document.body.clientWidth-vleft var bedge=document.body.clientHeight-vtop if (!combo.width) {vDiv.style.width=pTable.offsetWidth} else {vDiv.style.width=combo.width} if (combo.height==0) { vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 } else { if (htmltable.offsetHeight>combo.height) { vDiv.style.pixelHeight=combo.height vDivHtml.style.pixelHeight=combo.height } else { vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 } } vDivHtml.scrollTop=0 if (redge<vDiv.offsetWidth) vDiv.style.left=vleft-1-(vDiv.offsetWidth-redge) else vDiv.style.left=vleft-1 if (bedge<vDiv.offsetHeight) //vDiv.style.top=vtop-vDiv.offsetHeight-pDiv.offsetHeight vDiv.style.top=vtop-vDiv.offsetHeight+bedge else vDiv.style.top=vtop vDivHtml.style.width=parseInt(vDiv.style.width) vDiv.style.visibility="visible" } this.add=function(text,js){ combo.options[combo.options.length]=text combo.oj[combo.oj.length]=js } this.clearall=function(){ combo.options=new Array() } this.about=function(){ }
}
function mo(obj){
obj.style.backgroundColor="#000099"
obj.style.color="#ffffff"
}
function mu(obj){
obj.style.backgroundColor=""
obj.style.color="#000000"
}
document.onmousedown=function(){
if (vDiv.style.visibility=="visible"){
mx=event.x + document.body.scrollLeft
my=event.y + document.body.scrollTop;
x1=vDiv.offsetLeft
y1=vDiv.offsetTop
x2=vDiv.offsetLeft+vDiv.offsetWidth
y2=vDiv.offsetTop+vDiv.offsetHeight
if (mx<x1 || my<y1 || x2<mx || y2<my) { vDiv.style.visibility='hidden' }
}
}</script>
<style>
.selecttext{
border:0px
height: 16;
font-family:arial;
font-size:12px;
}
.selectbutton{
font-family:webdings;
font-size:10px;
height: 19;
width: 16;
border:1px solid #83A5EB;
line-height:0px;
padding-bottom:3px;
background-color:#D1E0FD
}
.selecttable{
font-family:arial;
font-size:12px;
cursor:default;
}
.selectcontent
{
position: absolute;
top:0;
left:0;
overflow:auto;
border:1px solid #000000
}
.selectdiv
{
position: absolute;
width:100;
overflow:hidden;
}
.select{
border-collapse: collapse;
border:1px solid #7F9DB9
}
</style>
</head>
<body bgcolor="#83A5EB" background="http://moodboy.com/puterjam/blog/attachments/month_0408/oldr_cs1.JPG">
<table border="0" width="100%"> <tr> <td width="151" align="center"><font size="2">可编辑的Select</font></td> <td><script>
var sel1=new editselect("select1","25","可编辑的Select","");
sel1.add("这是一个可以编辑的Select")
sel1.add("支持CSS")
sel1.add("可以通过CSS，修改外形")
sel1.add("突破原来的Select诸多限制")
</script></td> </tr> <tr> <td width="151" align="center"><font size="2">长度可以随意修改
可以设置为只读</font></td> <td> <script>
var sel2=new editselect("select2","20","长度可以随意修改",250,82,1);
sel2.add("这是一个可以编辑的Select")
sel2.add("支持CSS")
sel2.add("可以通过CSS，修改外形")
sel2.add("作者:舜子制作")
sel2.add("MSN:puterjam@msn.com")
</script> </td> </tr> <tr> <td width="151" align="center"><font size="2">可以遮盖系统Select</font></td> <td> <script>
var sel3=new editselect("select3","25","可以遮盖系统Select","",41);
sel3.add("这是一个可以编辑的Select")
sel3.add("支持CSS")
sel3.add("可以通过CSS，修改外形")
sel3.add("突破原来的Select诸多限制")
</script> </td> </tr> <tr> <td width="151" align="right">　</td> <td><select><option>系统的Select</option></select>　</td> </tr>
</table>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

接续上文
可编辑的select:

点击运行可以看到效果:
[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

为了让select里有更多的图片、css修饰及其他静、动态修饰效果，而select本身优先级别太高，其修饰效果很少且不能满足上述要求，遂涌现出很多模拟的select:

点击运行可以看到效果:

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

点击运行可以看到效果:

<center><sup><font face="隶书" color="blue">上标是不是这个？</font></sup><font size="6" face="华文行楷" color="red">如果要想以其他的文字作为上标该怎么做啊？</font><sub><font face="黑体" color="green"><b><i>下标是不是这个？</b></i></font></sub>
<base href="http://lucky.diy.myrice.com/temp/">
<body leftmargin="50" topmargin="50">
<style>
.optionForSel {font-size:9pt}
</style>
<center>
<table cellpadding="0" cellspacing="0" border="0" width="300"> <tr> <td id="selectLength" width="100%" style="height:20px;padding:0px;border:2px inset #404040;border-right:0px;border-bottom:1px solid #D4D0C8;font-size:9pt;"> <div id="selectedValue" style="padding:2px;border:0px;width:100%;height:20px;font-size:9pt;vertical-align:bottom"></div> </td> <td width="20" style="height:20px;padding:0px;border-top:2px inset #404040;border-left:0px;border-right:1px solid #D4D0C8;border-bottom:1px solid #D4D0C8;font-size:9pt"> <img src="button2.gif" width="20" height="21" border="0" id="mm" align="absmiddle"> </td> </tr>
</table>
<div id="dropdownOption" style="position:absolute;visibility:hidden;width:100%;border:1px solid #080808;z-index:1000"> <table width="100%" cellpadding="0" cellspacing="1" class="optionForSel" bgcolor="White"> <tr onmouseover="this.style.backgroundColor='#0099ff'" onmouseout="this.style.backgroundColor=''"> <td onclick="document.all.selectedValue.innerText=this.innerText"> <img src="http://lucky.myrice.com/images/copyright.gif" border="0" align="absmiddle" hspace="2"><a href="http://lucky.myrice.com">一个好孩子</a> </td> </tr> <tr> <td onmouseover="this.style.backgroundColor='#0099ff'" onmouseout="this.style.backgroundColor=''"onclick="document.all.selectedValue.innerText=this.innerText"> <img src='http://lucky.myrice.com/images/meng1.gif' border="0" align="absmiddle" hspace="2"><a href="http://lucky.myrice.com">二两疙瘩肉</a> </td> </tr> <tr> <td onmouseover="this.style.backgroundColor='#0099ff'" onmouseout="this.style.backgroundColor=''"onclick="document.all.selectedValue.innerText=this.innerText"> <img src='http://lucky.myrice.com/images/meng2.gif' border="0" align="absmiddle" hspace="2"><a href="http://lucky.myrice.com">三分油菜田</a> </td> </tr> </table>
</div>
<script>
function mm_Click()
{ if(document.all.dropdownOption.style.visibility == 'visible') document.all.dropdownOption.style.visibility='hidden' else document.all.dropdownOption.style.visibility='visible'
}
function init(){
document.all.dropdownOption.style.width = document.all.selectLength.clientWidth + 22;
document.all.selectedValue.contentEditable = true;
var strTop = 0;
var strLeft = 0;
var e1 = document.all.selectLength;
while(e1.tagName != "BODY")
{
strTop += e1.offsetTop
strLeft += e1.offsetLeft
e1 = e1.offsetParent
}
document.all.dropdownOption.style.top = String(strTop + 24) + "px";
document.all.dropdownOption.style.left = String(strLeft) + "px";
}
function clickE()
{
if(window.event.srcElement.id !='mm')
document.all.dropdownOption.style.visibility='hidden';
}
document.onclick = clickE
window.onload = init
</script>
<input onclick="alert(document.all.selectedValue.innerText)" type="button" value="得到选中的值">

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

下面这两个已达到较高的水准（动态内容）：

点击运行可以看到效果:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>EditSelect</title>
<script>
scHTML='<div id="selectcontent" class="selectdiv" style="visibility:hidden;"><iframe id=selframe frameborder=0 height=100%></iframe><div id="selecthtml" class="selectcontent">selectÁÐ±í</div></div>'
document.write(scHTML)
vDiv=selectcontent
vDivHtml=selecthtml
function editselect(name,size,defaulttext,width,height,readonly){ var combo=this; this.options=new Array(); this.name=name; this.divname=name+'_div'; this.buttonname=name+'_button'; this.tablename=name+'_table'; this.htmltable=name+'_html' if (!height) this.height=0; else this.height=height if (width) this.width=width if (!size) size=8 if (!defaulttext) defaulttext="" if (!readonly || readonly==0) {readonly="" }else {if (readonly==1) readonly="readonly style=cursor:default";this.readonly=1} esHTML='<div id='+this.divname+'>' +'<table id='+this.tablename+' cellpadding=0 cellspacing=0 class=select><tr><td bgcolor=#FFFFFF>' +'<textarea type=text class=selecttext cols="'+size+'" rows="1" name='+name+' value="'+defaulttext+'" contenteditable="false" '+readonly+'></textarea><td><button class=selectbutton id='+this.buttonname+'>6</td></tr></table>' +'</div>' document.write(esHTML) this.sbutton=eval("document.all."+this.buttonname) if (this.readonly==1) eval(this.name).onclick=function(){combo.show()} this.sbutton.onclick=function(){combo.show()} this.show=function(){ pDiv=eval(combo.divname) pTable=eval(combo.tablename) var vHTML='<table id=htmltable cellspacing="0" cellpadding="2" bgcolor="#ffffff" class="selecttable" width=100%>' for (i=0;i<combo.options.length;i++) { vHTML+='<tr onmouseover="mo(this)" onmouseout="mu(this)" onclick="document.all.'+combo.name+'.innerHTML=\'\';var t=document.createElement(\'span\');t.innerHTML=this.innerHTML;document.all.'+combo.name+'.appendChild(t);selectcontent.style.visibility=\'hidden\'"><td nowrap>'+combo.options[i] } vHTML+="</table>" vDivHtml.innerHTML=vHTML vtop=pDiv.offsetTop+pDiv.offsetHeight vleft=pDiv.offsetLeft+1 vParent = pDiv.offsetParent; while (vParent.tagName.toUpperCase() != "BODY") { vleft += vParent.offsetLeft; vtop += vParent.offsetTop; vParent = vParent.offsetParent; } var redge=document.body.clientWidth-vleft var bedge=document.body.clientHeight-vtop if (!combo.width) {vDiv.style.width=pTable.offsetWidth} else {vDiv.style.width=combo.width} if (combo.height==0) { vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 } else { if (htmltable.offsetHeight>combo.height) { vDiv.style.pixelHeight=combo.height vDivHtml.style.pixelHeight=combo.height } else { vDiv.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 vDivHtml.style.pixelHeight=parseInt(htmltable.offsetHeight)+2 } } vDivHtml.scrollTop=0 if (redge<vDiv.offsetWidth) vDiv.style.left=vleft-1-(vDiv.offsetWidth-redge) else vDiv.style.left=vleft-1 if (bedge<vDiv.offsetHeight) //vDiv.style.top=vtop-vDiv.offsetHeight-pDiv.offsetHeight vDiv.style.top=vtop-vDiv.offsetHeight+bedge else vDiv.style.top=vtop vDivHtml.style.width=parseInt(vDiv.style.width) vDiv.style.visibility="visible" } this.add=function(text){ combo.options[combo.options.length]=text } this.about=function(){ }
}
function mo(obj){
obj.style.backgroundColor="#000099"
obj.style.color="#ffffff"
}
function mu(obj){
obj.style.backgroundColor=""
obj.style.color="#000000"
}
document.onmousedown=function(){
if (vDiv.style.visibility=="visible"){
mx=event.x + document.body.scrollLeft
my=event.y + document.body.scrollTop;
x1=vDiv.offsetLeft
y1=vDiv.offsetTop
x2=vDiv.offsetLeft+vDiv.offsetWidth
y2=vDiv.offsetTop+vDiv.offsetHeight
if (mx<x1 || my<y1 || x2<mx || y2<my) { vDiv.style.visibility='hidden' }
}
}
</script>
<style>
.selecttext{
border:0px
height: 22;
font-family:arial;
font-size:14px;
overflow:hidden;
}
.selectbutton{
font-family:webdings;
font-size:10px;
height: 25;
width: 16;
border:1px solid #83A5EB;
line-height:0px;
padding-bottom:1px;
background-color:#D1E0FD
}
.selecttable{
font-family:arial;
font-size:12px;
cursor:default;
}
.selectcontent
{
position: absolute;
top:0;
left:0;
overflow:auto;
border:1px solid #000000
}
.selectdiv
{
position: absolute;
width:100;
overflow:hidden;
}
.select{
border-collapse: collapse;
border:1px solid #7F9DB9
}
</style>
</head>
<body bgcolor="#83A5EB" marginheight="0" marginwidth="0" topmargin="0" leftmargin="0">
<center>
<table border="0" width="234"> <tr> <td width="151" align="center"><font size="2">可编辑的Select</font></td> <td><script>
var sel1=new editselect("select1","25","可编辑的Select","");
sel1.add("<marquee behavior=alternate><img src='http://www.blueidea.com/articleimg/bbsimg/icon6.gif' align='absmiddle'> <B><font color=#22FF22>知</font><font color=#FF2222>往</font><font color=#001199>观</font><font color=#00fffa>来</font></B></marquee>")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon7.gif' align='absmiddle'> 微风香水")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon8.gif' align='absmiddle'> 阳光锈了")
sel1.add("<img src='http://www.blueidea.com/articleimg/bbsimg/icon9.gif' align='absmiddle'> <B><font color=#22FF22>观</font><font color=#FF2222>往</font><font color=#001199>知</font><font color=#00fffa>来</font></B>")
</script></td> </tr> <tr> <td width="151" align="right">　</td> <td> </td> </tr>
</table>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

点击运行可以看到效果:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<style type="text/css">
</style>
<script lanuage="JScript">
function turnit(ss)
{ if (ss.style.display=="none") {ss.style.display="";
} else {ss.style.display="none"; }
}
function sele(tid)
{
bb.style.display='none';
text1.value=tid.innerText;
}
function over(tid)
{
for (var i=1;i<4;i++)
{
eval('t'+i).className=''
}
tid.className='ss'
}
function out(tid)
{
if (bb.style.display!='none')
tid.className=''
}
</script>
<style type="text/css">
</style>
</head>
<body style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=green,endColorStr=white);SCROLLBAR-ARROW-COLOR: #fc0048; SCROLLBAR-TRACK-COLOR: #242400; SCROLLBAR-BASE-COLOR: #24b400;">
<table width="198" border="0" cellspacing="0" cellpadding="0" align="center"> <tr> <td width="198" nowrap>
<input name="text1" type="text" size="20" class=n1 readonly value=这里头别无选择 onclick=turnit(bb) style="color:red;font-family:隶书;font-size:14px;text-align:center;background:yellow;"><input name="Submit" type="text" class="n2" value="" readonly onclick=turnit(bb)> </td> </tr> <tr> <td id=bb style=display:none><div id="Layer1" style="position:absolute; width:198px; height:100px; overflow: scroll; overflow-x:hidden; z-index: 1;SCROLLBAR-ARROW-COLOR: #fc0048; SCROLLBAR-TRACK-COLOR: #242400; SCROLLBAR-BASE-COLOR: #24b400;" class="n1" > <table width="100%" border="0" cellpadding="0" cellspacing="0" id=tb> <tr> <td id=t1 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=lime,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">金翅擘海</td> </tr> <tr> <td id=t2 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=brown,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle"><B><font color="#22FF22">知</font><font color="#FF2222">往</font><font color="#001199">观</font><font color="#00fffa">来</font></B></td> </tr> <tr> <td id=t3 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=darckblue,endColorStr=white);"><marquee behavior="alternate"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">海阿洛瓦</marquee></td> </tr> <tr> <td id=t1 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=pink,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">蓝色月光</td> </tr> <tr> <td id=t2 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=red,endColorStr=white);"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle"><B><font color="#22FF22">波</font><font color="#FFdd22">希</font><font color="#001199">米</font><font color="#00fffa">亚 </font></B></td> </tr> <tr> <td id=t3 onMouseOver =over(this) onMouseOut =out(this) onclick=sele(this) style="FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=1,startColorStr=green,endColorStr=white);"><marquee behavior="alternate"><img src="http://www.blueidea.com/articleimg/usericon/hubro.gif" align="absmiddle">红色<a href="http://www.ruanchen.com/" style="color: #000">黑客</a></marquee></td> </tr> </table> </div></td> </tr>
</table>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

点击运行可以看到效果:

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

照片各部分的彩色与黑白交替更换无聊，写了个日历程序，欢迎拍砖

Javascript 中的 select发展史 超强

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Javascript 中的 select发展史超强