兼容ie的删除js，可获取到referrer连接

function drop_confirm(msg,url){

if(confirm(msg)){

goto_referrer(url);

}

}

//解决ie下没法保存referrer的问题

var isIE = '/MSIE (\d+\.\d+);/.test(navigator.userAgent) || /MSIE(\d+\.\d+);/.test(navigator.userAgent)';

//re-define for IE

function goto_referrer(url) {

if (isIE) {

var referLink = document.createElement('a');

referLink.href = url;

document.body.appendChild(referLink);

referLink.click();

}else{

location.href = url;

}

}