web 端JS取得window 的按键动作(按下Shift, Alt,Ctrl....)
如何取得
基本上都是从动作的event 中去判断。
IE下的处理
在IE中， window 对象里就有包含event. 看例子：
[html]
<!--Add by oscar999-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Author" CONTENT="oscar999">
<script>
function showWinEvent()
{
if(window.event.altKey)
{
alert("you pressed Alt Key");
}else if(window.event.ctrlKey)
{
alert("you pressed Ctrl Key");
}else if(window.event.shiftKey)
{
alert("you pressed Shift Key");
}else{
//alert(window.event.button)
}
}
</script>
</HEAD>
<BODY>
<input onclick="showWinEvent()" type="button" value="click me">
</BODY>
</HTML>
<!--Add by oscar999-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Author" CONTENT="oscar999">
<script>
function showWinEvent()
{
if(window.event.altKey)
{
alert("you pressed Alt Key");
}else if(window.event.ctrlKey)
{
alert("you pressed Ctrl Key");
}else if(window.event.shiftKey)
{
alert("you pressed Shift Key");
}else{
//alert(window.event.button)
}
}
</script>
</HEAD>
<BODY>
<input onclick="showWinEvent()" type="button" value="click me">
</BODY>
</HTML>
以上在IE和Chrome 中都能work, 但是在firefox中却有问题， 会报undefined 的错误， 因为firefox 的window 对象不包含event.
兼容firefox的方式
[html]
<!--Add by oscar999-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Author" CONTENT="oscar999">
<script>
function showWinEvent(evn)
{
if(evn.altKey)
{
alert("you pressed Alt Key");
}else if(evn.ctrlKey)
{
alert("you pressed Ctrl Key");
}else if(evn.shiftKey)
{
alert("you pressed Shift Key");
}else{
//alert(window.event.button)
}
}
</script>
</HEAD>
<BODY>
<input onclick="showWinEvent(event)" type="button" value="click me">
</BODY>
</HTML>
<!--Add by oscar999-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Author" CONTENT="oscar999">
<script>
function showWinEvent(evn)
{
if(evn.altKey)
{
alert("you pressed Alt Key");
}else if(evn.ctrlKey)
{
alert("you pressed Ctrl Key");
}else if(evn.shiftKey)
{
alert("you pressed Shift Key");
}else{
//alert(window.event.button)
}
}
</script>
</HEAD>
<BODY>
<input onclick="showWinEvent(event)" type="button" value="click me">
</BODY>
</HTML>
补充：web前端 , JavaScript ,
