代码如下: //语法:prev(element) //参数:element对象 //返回:对象在当前级别中是第几个元素,从1开始 //2010-08-26 15:13:55 function prev(elem,cont) { if(!cont){cont=1} elem = elem.previousSibling; if(elem){return prev(elem,(cont+1))} return cont } prev($(“ext-gen232”))