js 根据url获取参数（主要针对iframe传参）
?/**? * 获取url参数（主要解决iframe传递参数）? */?function getUrlParam(_url,key){??if (_url.lastIndexOf("?") != -1) {???var queryStr = _url.substring(_url.lastIndexOf("?") + 1, _url.length);???if(!key)????return queryStr;//返回所有参数???else{????var params? = queryStr.split("&");????for(var j = 0 ;j < params.length;j++){?????? var tmp = params[j].split("=");?????? if(tmp[0]==key){????????? return tmp[1];????????? break;?????? }????}???}??????}?}调用方法：var URL = document.location.toString();getUrlParam(URL,'parmaname');?