一段js 在网页中加统计代码

document.write ('网站统计\\n');
var a0495tf="51la";var a0495pu="";var a0495pf="51la";var a0495su=window.location;var a0495sf=document.referrer;var a0495of="";var a0495op="";var a0495ops=1;var a0495ot=1;var a0495d=new Date();var a0495color="";if (navigator.appName=="Netscape"){a0495color=screen.pixelDepth;} else {a0495color=screen.colorDepth;}
try{a0495tf=top.document.referrer;}catch(e){}
try{a0495pu =window.parent.location;}catch(e){}
try{a0495pf=window.parent.document.referrer;}catch(e){}
try{a0495ops=document.cookie.match(new RegExp("(^| )AJSTAT_ok_pages=([^;]*)(;|$)"));a0495ops=(a0495ops==null)?1: (parseInt(unescape((a0495ops)[2]))+1);var a0495oe =new Date();a0495oe.setTime(a0495oe.getTime()+60*60*1000);document.cookie="AJSTAT_ok_pages="+a0495ops+ ";path=/;expires="+a0495oe.toGMTString();a0495ot=document.cookie.match(new RegExp("(^| )AJSTAT_ok_times=([^;]*)(;|$)"));if(a0495ot==null){a0495ot=1;}else{a0495ot=parseInt(unescape((a0495ot)[2])); a0495ot=(a0495ops==1)?(a0495ot+1):(a0495ot);}a0495oe.setTime(a0495oe.getTime()+365*24*60*60*1000);document.cookie="AJSTAT_ok_times="+a0495ot+";path=/;expires="+a0495oe.toGMTString();}catch(e){}
try{if(document.cookie==""){a0495ops=-1;a0495ot=-1;}}catch(e){}
a0495of=a0495sf;if(a0495pf!=="51la"){a0495of=a0495pf;}if(a0495tf!=="51la"){a0495of=a0495tf;}a0495op=a0495pu;try{lainframe}catch(e){a0495op=a0495su;}document.write('');