function Cookie(key,value) { this.key=key; if(value!=null) { this.value=escape(value); } this.expiresTime=null; this.domain=null; this.path="https://www.jb51.net/"; this.secure=null; } Cookie.prototype.setValue=function(value){this.value=escape(value);} Cookie.prototype.getValue=function(){return (this.value);} Cookie.prototype.setExpiresTime=function(time){this.expiresTime=time;} Cookie.prototype.getExpiresTime=function(){return this.expiresTime;} Cookie.prototype.setDomain=function(domain){this.domain=domain;} Cookie.prototype.getDomain=function(){return this.domain;} Cookie.prototype.setPath=function(path){this.path=path;} Cookie.prototype.getPath=function(){return this.path;} Cookie.prototype.Write=function(v) { if(v!=null) { this.setValue(v); } var ck=this.key+"="+this.value; if(this.expiresTime!=null) { try { ck+=";expires="+this.expiresTime.toUTCString();; } catch(err) { alert("expiresTime参数错误"); } } if(this.domain!=null) { ck+=";domain="+this.domain; } if(this.path!=null) { ck+=";path="+this.path; } if(this.secure!=null) { ck+=";secure"; } document.cookie=ck; } Cookie.prototype.Read=function() { try { var cks=document.cookie.split("; "); var i=0; for(i=0;i <cks.length;i++) { var ck=cks[i]; var fields=ck.split("="); if(fields[0]==this.key) { this.value=fields[1]; return (this.value); } } return null; } catch(err) { alert("cookie读取错误"); return null; } }
HTML code：
<script type="text/javascript" src="https://www.jb51.net/Cookie.js"></script> <script type="text/javascript" language="javascript"> window.onload=function(){ var ck=new Cookie("HasLoaded"); //每个页面的new Cookie名HasLoaded不能相同 if(ck.Read()==null){//未加载过，Cookie内容为空 alert("首次打开页面"); //设置保存时间 var dd = new Date(); dd = new Date(dd.getYear() + 1900, dd.getMonth(), dd.getDate()); dd.setDate(dd.getDate() + 365); ck.setExpiresTime(dd); ck.Write("true"); //设置Cookie。只要IE不关闭，Cookie就一直存在 } else{//Cookie存在，表示页面是被刷新的 alert("页面刷新"); } } </script>