[原创]用srcElement实现添加效果- Javascript

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Javascript 中的 [原创]用srcElement实现添加效果

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-10 浏览: 223 ::

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模拟抽奖获取对象

点击运行可以看到效果:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
</style>
<script language="javascript">
function addthis(){
var srcE=event.srcElement?event.srcElement:event.target;
var thev=srcE.value;
//alert(thev);
var s=document.forms[0].likes.value.indexOf(thev)
if(s==-1){
document.forms[0].likes.value+=thev+",";
}}
</script>
</head>
<body>
<form name="form1"> <font color="#666666"> <textarea name="likes" cols="40" rows="2" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea> </font> <table border="0" width="100%" cellspacing="0" cellpadding="0" > <tr> <td><input name="activity" type="checkbox" value="电脑/网络" id="activity_1" onclick="javascript:addthis()" /> <label for="activity_1" class="l">电脑/网络</label></td> <td><label for="activity_2" class="l"> <input name="activity2" type="checkbox" value="电子游戏" id="activity_2" onclick="javascript:addthis()"/> 电子游戏</label></td> <td><input name="activity2" type="checkbox" value="体育运动" id="activity_3" onclick="javascript:addthis()" /> <label for="activity_3" class="l">体育运动</label></td> <td><input name="activity2" type="checkbox" value="饮酒" id="activity_4" /> <label for="activity_4" class="l">饮酒</label></td> <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" /> <label for="activity_5" class="l">品茗</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="弹琴" id="activity_6" /> <label for="activity_6" class="l">弹琴</label></td> <td><input name="activity2" type="checkbox" value="看电影/电视" id="activity_7" /> <label for="activity_7" class="l">看电影/电视</label></td> <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" /> <label for="activity_8" class="l">下棋/打牌</label></td> <td><input name="activity2" type="checkbox" value="观光旅游" id="activity_9" /> <label for="activity_9" class="l">观光旅游</label></td> <td><input name="activity2" type="checkbox" value="逛街购物" id="activity_10" /> <label for="activity_10" class="l">逛街购物</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="阅读" id="activity_11" /> <label for="activity_11" class="l">阅读</label></td> <td><input name="activity2" type="checkbox" value="写作" id="activity_12" /> <label for="activity_12" class="l">写作</label></td> <td><input name="activity2" type="checkbox" value="烹调" id="activity_13" /> <label for="activity_13" class="l">烹调</label></td> <td><input name="activity2" type="checkbox" value="舞会/卡拉OK" id="activity_14" /> <label for="activity_14" class="l">舞会/卡拉OK</label></td> <td><input name="activity2" type="checkbox" value="健身/武术" id="activity_15" /> <label for="activity_15" class="l">健身/武术</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="水上活动" id="activity_16" /> <label for="activity_16" class="l">水上活动</label></td> <td><input name="activity2" type="checkbox" value="文艺表演" id="activity_17" /> <label for="activity_17" class="l">文艺表演</label></td> <td><input name="activity2" type="checkbox" value="18" id="activity_18" /> <label for="activity_18" class="l">聊天</label></td> <td><input name="activity2" type="checkbox" value="19" id="activity_19" /> <label for="activity_19" class="l">家事/手工艺　</label></td> <td><input name="activity2" type="checkbox" value="20" id="activity_20" /> <label for="activity_20" class="l">书法/绘画</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="21" id="activity_21" /> <label for="activity_21" class="l">储蓄/投资</label></td> <td><input name="activity2" type="checkbox" value="22" id="activity_22" /> <label for="activity_22" class="l">养宠物</label></td> <td><input name="activity2" type="checkbox" value="23" id="activity_23" /> <label for="activity_23" class="l">听音乐</label></td> <td><input name="activity2" type="checkbox" value="24" id="activity_24" /> <label for="activity_24" class="l">各种收集活动　</label></td> <td><input name="activity2" type="checkbox" value="25" id="activity_25" /> <label for="activity_25" class="l">摄影/艺术创作</label></td> </tr> </table>
</form>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

2006-08-21可以自己检测，不要每个checkbox加事件,删除功能没有实现

点击运行可以看到效果:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
</style>
<script language="javascript">
function addthis(){
var srcE=event.srcElement?event.srcElement:event.target;
if((srcE.tagName=="INPUT")&&(srcE.type.toLowerCase()=="checkbox")){
var thev=srcE.value;
var theid=srcE.id;
//alert(theid);
if(theid.indexOf('xinge')!=-1){
thetag="xinge";
}else{
thetag="likes";
}
//alert(thetag);
switch(thetag){
case "likes":
var s=document.forms[0].likes.value.indexOf(thev);
if(s==-1){
document.forms[0].likes.value+=thev+",";
}
break;
case "xinge":
var s=document.forms[0].xinge.value.indexOf(thev);
if(s==-1){
document.forms[0].xinge.value+=thev+",";
}
break;
}
}}
document.onmousedown=addthis;
</script>
</head>
<body>
<form name="form1"><textarea name="likes" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>
<textarea name="xinge" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea> <table border="0" width="100%" cellspacing="0" cellpadding="0" > <tr> <td colspan="5">兴趣爱好</td> </tr> <tr> <td><input name="activity" type="checkbox" value="电脑/网络" id="activity_1" /> <label for="activity_1" class="l">电脑/网络</label></td> <td><label for="activity_2" class="l"> <input name="activity2" type="checkbox" value="电子游戏" id="activity_2"/> 电子游戏</label></td> <td><input name="activity2" type="checkbox" value="体育运动" id="activity_3" /> <label for="activity_3" class="l">体育运动</label></td> <td><input name="activity2" type="checkbox" value="饮酒" id="activity_4" /> <label for="activity_4" class="l">饮酒</label></td> <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" /> <label for="activity_5" class="l">品茗</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="弹琴" id="activity_6" /> <label for="activity_6" class="l">弹琴</label></td> <td><input name="activity2" type="checkbox" value="看电影/电视" id="activity_7" /> <label for="activity_7" class="l">看电影/电视</label></td> <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" /> <label for="activity_8" class="l">下棋/打牌</label></td> <td><input name="activity2" type="checkbox" value="观光旅游" id="activity_9" /> <label for="activity_9" class="l">观光旅游</label></td> <td><input name="activity2" type="checkbox" value="逛街购物" id="activity_10" /> <label for="activity_10" class="l">逛街购物</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="阅读" id="activity_11" /> <label for="activity_11" class="l">阅读</label></td> <td><input name="activity2" type="checkbox" value="写作" id="activity_12" /> <label for="activity_12" class="l">写作</label></td> <td><input name="activity2" type="checkbox" value="烹调" id="activity_13" /> <label for="activity_13" class="l">烹调</label></td> <td><input name="activity2" type="checkbox" value="舞会/卡拉OK" id="activity_14" /> <label for="activity_14" class="l">舞会/卡拉OK</label></td> <td><input name="activity2" type="checkbox" value="健身/武术" id="activity_15" /> <label for="activity_15" class="l">健身/武术</label></td> </tr> <tr> <td colspan="5">性格：</td> </tr> <tr> <td><input name="activity2" type="checkbox" value="活泼" id="xinge_16" /> <label for="xinge_16" class="l">活泼</label></td> <td><input name="activity2" type="checkbox" value="尖刻" id="xinge_17" /> <label for="xinge_17" class="l">尖刻</label></td> <td><input name="activity2" type="checkbox" value="自闭" id="xinge_18" /> <label for="xinge_18" class="l">自闭</label></td> <td><input name="activity2" type="checkbox" value="等等" id="xinge_19" /> <label for="xinge_19" class="l">等等　</label></td> <td><input name="activity2" type="checkbox" value="外向" id="xinge_20" /> <label for="xinge_20" class="l">外向</label></td> </tr> </table>
</form>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

blueidea斑竹回复，推荐

点击运行可以看到效果:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
</style>
<script language="javascript">
var likes=new Array(); xinge=new Array();
function addthis(e){ var e, srcE, op, opt, i; e=window.event?window.event:e; srcE=e.srcElement?e.srcElement:e.target; if(!srcE)return; if(String(srcE.tagName).toLowerCase()!="input"||String(srcE.type).toLowerCase()!="checkbox")return; if(srcE.id.indexOf("xinge")!=-1){ op=xinge; opt=document.forms[0].xinge }else{ op=likes; opt=document.forms[0].likes; } if(srcE.checked){ i=-1; while(op[++i])if(op[i]==srcE.value)return; op[i]=srcE.value; }else{ i=-1; while(op[++i])if(op[i]==srcE.value){op.splice(i,1);i--;} } opt.value=op;
}
document.onkeydown=document.onchange=document.onclick=addthis;
</script>
</head>
<body>
<form name="form1"><textarea name="likes" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>
<textarea name="xinge" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea> <table border="0" width="100%" cellspacing="0" cellpadding="0" > <tr> <td colspan="5">兴趣爱好</td> </tr> <tr> <td><input name="activity" type="checkbox" value="电脑/网络" id="activity_1" /> <label for="activity_1" class="l">电脑/网络</label></td> <td><label for="activity_2" class="l"> <input name="activity2" type="checkbox" value="电子游戏" id="activity_2"/> 电子游戏</label></td> <td><input name="activity2" type="checkbox" value="体育运动" id="activity_3" /> <label for="activity_3" class="l">体育运动</label></td> <td><input name="activity2" type="checkbox" value="饮酒" id="activity_4" /> <label for="activity_4" class="l">饮酒</label></td> <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" /> <label for="activity_5" class="l">品茗</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="弹琴" id="activity_6" /> <label for="activity_6" class="l">弹琴</label></td> <td><input name="activity2" type="checkbox" value="看电影/电视" id="activity_7" /> <label for="activity_7" class="l">看电影/电视</label></td> <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" /> <label for="activity_8" class="l">下棋/打牌</label></td> <td><input name="activity2" type="checkbox" value="观光旅游" id="activity_9" /> <label for="activity_9" class="l">观光旅游</label></td> <td><input name="activity2" type="checkbox" value="逛街购物" id="activity_10" /> <label for="activity_10" class="l">逛街购物</label></td> </tr> <tr> <td><input name="activity2" type="checkbox" value="阅读" id="activity_11" /> <label for="activity_11" class="l">阅读</label></td> <td><input name="activity2" type="checkbox" value="写作" id="activity_12" /> <label for="activity_12" class="l">写作</label></td> <td><input name="activity2" type="checkbox" value="烹调" id="activity_13" /> <label for="activity_13" class="l">烹调</label></td> <td><input name="activity2" type="checkbox" value="舞会/卡拉OK" id="activity_14" /> <label for="activity_14" class="l">舞会/卡拉OK</label></td> <td><input name="activity2" type="checkbox" value="健身/武术" id="activity_15" /> <label for="activity_15" class="l">健身/武术</label></td> </tr> <tr> <td colspan="5">性格：</td> </tr> <tr> <td><input name="activity2" type="checkbox" value="活泼" id="xinge_16" /> <label for="xinge_16" class="l">活泼</label></td> <td><input name="activity2" type="checkbox" value="尖刻" id="xinge_17" /> <label for="xinge_17" class="l">尖刻</label></td> <td><input name="activity2" type="checkbox" value="自闭" id="xinge_18" /> <label for="xinge_18" class="l">自闭</label></td> <td><input name="activity2" type="checkbox" value="等等" id="xinge_19" /> <label for="xinge_19" class="l">等等　</label></td> <td><input name="activity2" type="checkbox" value="外向" id="xinge_20" /> <label for="xinge_20" class="l">外向</label></td> </tr> </table>
</form>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

splice 方法
从一个数组中移除一个或多个元素，如果必要，在所移除元素的位置上插入新元素，返回所移除的元素。
arrayObj.splice(start, deleteCount, [item1[, item2[, . . . [,itemN]]]])
参数
arrayObj 必选项。一个 Array 对象。
start
必选项。指定从数组中移除元素的开始位置，这个位置是从 0 开始计算的。
deleteCount
必选项。要移除的元素的个数。
item1, item2,. . .,itemN
必选项。要在所移除元素的位置上插入的新元素。
说明
splice 方法可以移除从 start 位置开始的指定个数的元素并插入新元素，从而修改 arrayObj。返回值是一个由所移除的元素组成的新 Array 对象。

模拟抽奖获取对象

Javascript 中的 [原创]用srcElement实现添加效果

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