<body>
<input type="text" name="">
<script language="javascript">
document.attachEvent("onkeydown",canelBackspace);
function canelBackspace(){
if((event.keyCode==8) && (event.srcElement.type=="text" || event.srcElement.type=="textarea" || event.srcElement.type=="password")) return true;
else event.keyCode=null;
}
</script>
</body>
<input type="text" name="">
<script language="javascript">
document.attachEvent("onkeydown",canelBackspace);
function canelBackspace(){
if((event.keyCode==8) && (event.srcElement.type=="text" || event.srcElement.type=="textarea" || event.srcElement.type=="password")) return true;
else event.keyCode=null;
}
</script>
</body>
{
var k = window.event.keyCode;
if (k == 8)
{
window.event.keyCode = 0;
window.event.returnValue= false;
}
}
<html>
<frameset cols="25%,*" border=1>
<frame src="menu.jsp" name="leftFrame" scrolling="AUTO" marginheight="0" marginwidth="0">
<frame src="" name="rightFrame" scrolling="AUTO" marginheight="0" marginwidth="0">
</frameset>
</html>
如何在这个html文件中屏蔽掉退格(BackSpace)键?