var title = "xxxx";
var content = '<iframe scrolling="auto" frameborder="0" src="Purchase/PurchaseAdd.html" style="100%;height:100%;"></iframe>';
top.jQuery("#tabs").tabs('add', {
title: title,
content: content,
closable: true,
fit: true
});
注：#tabs是父Id，上面这段js代码写在子js文件里