如果你下载后，对首页模板进行了修改，

删除了下面一些代码后，很可能就是以下这段JS引起

<SCRIPT type=text/javascript>
jQuery(document).ready(function(){
var SDmodel = new scrollDoor();
SDmodel.sd(["m01","m02","m12"],["c01","c02","c12"],"sd01","sd02");
SDmodel.sd(["m03","m04"],["c03","c04"],"sd01","sd02");
SDmodel.sd(["m05","m06","m07","m08","m09"],["c05","c06","c07","c08","c09"],"sd01","sd02");
SDmodel.sd(["m10","m11"],["c10","c11"],"sd01","sd02");
SDmodel.sd(["m13","m14"],["c13","c14"],"sd01","sd02");
})
</SCRIPT>

即你如果删除了一选项卡，这里对应的也要删除。不然JS出错了，就导致顶部显示不出来