Handling cookies with javascript

Javascript functions that set and retrieve cookie values

<html>
<head>

<script type="text/javascript">

function getCookie(c_name){
   if (document.cookie.length>0){
      c_start=document.cookie.indexOf(c_name + "=");
      if (c_start!=-1){
         c_start=c_start + c_name.length+1;
         c_end=document.cookie.indexOf(";",c_start);

         if (c_end==-1) c_end=document.cookie.length;
            return unescape(document.cookie.substring(c_start,c_end));
      }
   }
   return "";
}

function setCookie(c_name,value,expiredays){
   var exdate=new Date();
   exdate.setDate(exdate.getDate()+expiredays);
   document.cookie=c_name+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}

function checkCookie(){
   username=getCookie('username');
   if (username!=null && username!=""){
      alert('Welcome again '+username+'!');
   }
   else{
      username=prompt('Please enter your name:',"");
      if (username!=null && username!=""){
         setCookie('username',username,365);
      }
   }
}

</script>
</head>

<body onload="checkCookie()">
</body>
</html>

Description

Setting cookies with these functions will be easy from now on

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