js cookies统计访问次数

<script type="text/javascript">

if(getCookie("num")){

var nn=parseInt(getCookie("num"));

setCookie("num",++nn);

}else{

setCookie("num",1);

}

function getCookie(name){

var str=document.cookie.split(";");

for(i=0;i<str.length;i++){

var str2=str[i].split("=")

if(str2[0].replace(//s(.*)/s/,"$1")==name){

return str2[1];

}

}

}

function setCookie(name,value){

var Days=30;

var exp = new Date();

exp.setTime(exp.getTime() + Days*24*60*60*1000);

document.cookie = name + "="+ escape(value) +";expires"+ exp.toGMTString();

}

alert("您是第"+getCookie("num")+"次访问");

/*String.prototype.Trim=function(){

return this.replace(//s(.*)/s/,"$1");

}

String.prototype.alert2=function(str){

alert("我是alert2！！！哈哈哈哈 实际内容是:"+str);

}

var aa="";

aa.alert("liugang");*/

</script>