$("#backPrev").attr("href","javascript:void(0);").click(function(){
if (/(iPhone|iPad|iPod)/i.test(navigator.userAgent)) { window.location.href = window.document.referrer; } else { window.history.go("-1"); }});参考博文：http://www.cnblogs.com/qingliuyu/archive/2012/05/03/2481305.html