在IE中一般用js:obj.onselectstart=function(){return false;}

firefox用CSS:-moz-user-select:none

IE下面用JS
<script type=”text/javascript”>
document.onselectstart = function(){
return false;
}
</script>

FF下面CSS
<style type=”text/css”>
body {
-moz-user-select: none;
}
</style>