获取iframe中src的值

 <iframe id="toolbar" width="300px" height="300px" name="toolbar" scrolling="no" frameborder="0" src="https://id.kua.com/pass/kua/login/logout?sid=kua.oauth&usem=20"></iframe>
 
 

js封装取src的值

 function getIframeParams(iframeId) {
        var regexpParam = /\??([\w\d%]+)=([\w\d%]*)&?/g; //分离参数的正则表达式
        var targetEle = document.getElementById(iframeId);
        var paramMap = null;
        if (!!targetEle) {
            var url = targetEle.src; //取得iframe的url
            var ret;
            paramMap = {};//初始化结果集
            //开始循环查找url中的参数，并以键值对形式放入结果集
            while ((ret = regexpParam.exec(url)) != null) {
                //ret[1]是参数名，ret[2]是参数值
                paramMap[ret[1]] = ret[2];
            }
        }

        return paramMap; //返回结果集
    }
    

获取

    var sd = getIframeParams('toolbar');
    console.log(sd.usem)