// insert querystring key and get value
function queryStringValue(findName){
	var name = new String();
	var value = new String();
	var querystring = document.location.href;
	if((querystring.indexOf("?")==-1)||(querystring.indexOf("=")==-1)){
		return "null";
	}

	querystring = querystring.split("?");
	querystring = querystring[1].split("&");
	for(q=0;q<querystring.length;q++){
		var pair = querystring[q].split("=");
		name = pair[0].toLowerCase();
		value = pair[1].toLowerCase();
			if(findName.toLowerCase() == name){
				return value;
			}
	}
}

// sets the 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.toUTCString());
}

//checks whether the cookie is set
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 "";
}