Javascript生成GUID

<script language="JavaScript" type="text/javascript">

function newGuid()

{

var guid = "";

for (var i = 1; i <= 32; i++){

var n = Math.floor(Math.random()*16.0).toString(16);

guid += n;

if((i==8)||(i==12)||(i==16)||(i==20))

guid += "-";

}

return guid;

}

document.write(newGuid());

</script>