一個javascript文法問題

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

上面這段指令碼，匿名函數不執行，原因是$(window)這句結尾少了";"。