<script>
function check(){
alert('a');
}
var checkFS=check+"";
checkFS=checkFS.replace("}",checkFS+"alert('haha');}");
eval(checkFS);
?
?
//check();
?
//eval('check()');
?
?
?
function a(x,y){alert(x+" ?"+y);}
function a(x){alert(x);}
?
alert(typeof a);
//相同名的函数会覆盖,不会重载
</script>