<script type="text/javascript">
/*<![CDATA[*/
csdn=function(){
alert("www.csdn.net");
}delete csdn;
document.write(typeof csdn, "<br/>");var csdn1=function(){
alert("www.csdn.net");
}
delete csdn1
document.write(typeof csdn1, "<br/>");
/*]]>*/
</script>
i = 44;
function fn2() {
var i = 55;
alert(i);
}
fn2();