// create + store cookie
	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 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 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);
			}
		  }
		}*/