8.文本选择window.getSelection
例 1.8（文本选择IEFF.html)
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<script type="text/javascript">
function fun1(){
if(window.getSelection){//DOM,FF,Webkit,Chrome,IE10
alert("马克-to-win：火狐click事件包括鼠标点下和抬起两个动作，不抬起不算结束，所以可以选择文本。 window.getSelection is "+window.getSelection);
selectionText = window.getSelection();
}else if(document.getSelection){//IE10
selectionText = document.getSelection();
}else if(document.selection){//IE6+10-
selectionText = document.selection.createRange().text;
}else{
selectionText = "";
}
strlen = selectionText.toString();
alert(strlen);
// alert(document.selection.createRange().text);
}
</script>
<body>
<body οnclick="fun1();">
Select this textsfsadfsdafsdagfsadgsagsadgfsd
sdgsagsadgsafghgfhfh
gsadgsaghfghfhgfhf
sabhhfghgfhfghfh
gsfdghf
sdaggfhf
gdhfghdf
sdagdhg
</body>
</body>
</html>
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