javascript键盘事件全面控制脚本代码- Javascript

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Javascript 中的 javascript键盘事件全面控制脚本代码

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-12 浏览: 141 ::

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javascript动画效果打开/关闭层 javascript键盘上下键的操作(选择)

可以根据按的键盘上的键，显示键盘动作，并显示keyCode值等

点击运行可以看到效果:

<STYLE TYPE="text/css">
TD {text-align:center}
</STYLE>
<SCRIPT LANGUAGE="JavaScript">
function init() { document.onkeydown = showKeyDown document.onkeyup = showKeyUp document.onkeypress = showKeyPress
}
function showKeyDown(evt) { evt = (evt) ? evt : window.event document.getElementById("pressKeyCode").innerHTML = 0 document.getElementById("upKeyCode").innerHTML = 0 document.getElementById("pressCharCode").innerHTML = 0 document.getElementById("upCharCode").innerHTML = 0 restoreModifiers("") restoreModifiers("Down") restoreModifiers("Up") document.getElementById("downKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("downCharCode").innerHTML = evt.charCode } showModifiers("Down", evt)
}
function showKeyUp(evt) { evt = (evt) ? evt : window.event document.getElementById("upKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("upCharCode").innerHTML = evt.charCode } showModifiers("Up", evt) return false
}
function showKeyPress(evt) { evt = (evt) ? evt : window.event document.getElementById("pressKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("pressCharCode").innerHTML = evt.charCode } showModifiers("", evt) return false
}
function showModifiers(ext, evt) { restoreModifiers(ext) if (evt.shiftKey) { document.getElementById("shift" + ext).style.backgroundColor = "#ff0000" } if (evt.ctrlKey) { document.getElementById("ctrl" + ext).style.backgroundColor = "#00ff00" } if (evt.altKey) { document.getElementById("alt" + ext).style.backgroundColor = "#0000ff" }
}
function restoreModifiers(ext) { document.getElementById("shift" + ext).style.backgroundColor = "#ffffff" document.getElementById("ctrl" + ext).style.backgroundColor = "#ffffff" document.getElementById("alt" + ext).style.backgroundColor = "#ffffff"
}
</SCRIPT>
</HEAD>
<BODY onLoad="init()">
<H1>Keyboard Event Handler Lab</H1>
<HR>
<FORM>
<TABLE BORDER=2 CELLPADDING=2>
<TR><TH></TH><TH>onKeyDown</TH><TH>onKeyPress</TH><TH>onKeyUp</TH></TR>
<TR><TH>Key Codes</TH> <TD ID="downKeyCode">0</TD> <TD ID="pressKeyCode">0</TD> <TD ID="upKeyCode">0</TD>
</TR>
<TR><TH>Char Codes (IE5/Mac; NN6)</TH> <TD ID="downCharCode">0</TD> <TD ID="pressCharCode">0</TD> <TD ID="upCharCode">0</TD>
</TR>
<TR><TH ROWSPAN=3>Modifier Keys</TH> <TD><SPAN ID="shiftDown">Shift</SPAN></TD> <TD><SPAN ID="shift">Shift</SPAN></TD> <TD><SPAN ID="shiftUp">Shift</SPAN></TD>
</TR>
<TR> <TD><SPAN ID="ctrlDown">Ctrl</SPAN></TD> <TD><SPAN ID="ctrl">Ctrl</SPAN></TD> <TD><SPAN ID="ctrlUp">Ctrl</SPAN></TD>
</TR>
<TR> <TD><SPAN ID="altDown">Alt</SPAN></TD> <TD><SPAN ID="alt">Alt</SPAN></TD> <TD><SPAN ID="altUp">Alt</SPAN></TD>
</TR>
</TABLE>
</FORM>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

javascript动画效果打开/关闭层 javascript键盘上下键的操作(选择)

Javascript 中的 javascript键盘事件全面控制脚本代码

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