JSはCookieでページが初めて開くかどうかを判断します.

余計なことを言わないで、直接コードを貼りました.本文の書き方がよくないです.どうかご容赦ください.
JScript code:

function Cookie(key,value)
{
this.key=key;
if(value!=null)
{
this.value=escape(value);
}
this.expiresTime=null;
this.domain=null;
this.path="/";
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    ");
}
}
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  
 

HTMLコード:

window.onload=function(){
var ck=new Cookie("HasLoaded"); //     new Cookie HasLoaded    
if(ck.Read()==null){//    ，Cookie    
alert("      ");
//      
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"); //  Cookie。  IE   ，Cookie     
}
else{//Cookie  ，         
alert("    ");
}
}

以上述べたように、JSがCookieを通じてページが最初に開かれたかどうかの関連内容を共有します.