Chèn code sau vào thẻ <head>
<style>
.highlighttext{
background-color:yellow;
font-weight:bold;
}
</style>
<script language="Javascript">
<!--
/*
Select and Copy form element script- By Dynamicdrive.com
For full source, Terms of service, and 100s DTHML scripts
Visit http://www.dynamicdrive.com
*/
//specify whether contents should be auto copied to clipboard (memory)
//Applies only to IE 4+
//0=no, 1=yes
var copytoclip=1
function HighlightAll(theField) {
var tempval=eval("document."+theField)
tempval.focus()
tempval.select()
if (document.all&©toclip==1){
therange=tempval.createTextRange()
therange.execCommand("Copy")
window.status="Contents highlighted and copied to clipboard!"
setTimeout("window.status=''",1800)
}
}
//-->
</script>
Sau đó cho đoạn code sau vào thẻ <BODY>
<form name="test">
<a class="highlighttext" href="javascript:HighlightAll('test.select1')">Select All</a><br>
<textarea name="select1" rows=10 cols=35 >This is some text. This is some text. This is some text. This is some text.</textarea>
</form>
Chúc bạn thành công
Nguồn


