一个javascript语法问题

<mce:script type="text/javascript"><!--$(window).bind("scroll",function(){$("#nav").css({top:$(window).scrollTop()});})(function(){ var _bd = document.body; if(_bd.attachEvent){ _bd.attachEvent("onclick",function(event){count_div(event.srcElement)}) }else{ _bd.addEventListener("click",function(event){count_div(event.target)},false); } })();// --></mce:script> 

上面这段脚本，匿名函数不执行，原因是$(window)这句结尾少了";"。