function readCookie(name){
		  var cookieValue = "";
		  var search = name + "=";
		  if(document.cookie.length > 0)  { 
			var offset = document.cookie.indexOf(search);
			if (offset != -1)    { 
			  offset += search.length;
			  var end = document.cookie.indexOf(";", offset);
			  if (end == -1) end = document.cookie.length;
			  cookieValue = unescape(document.cookie.substring(offset, end))
			}
		  }
		  return cookieValue;
	}
	
	function writeCookie(name, value, hours){
	  var expire = "";
	  if(hours != null) {
		expire = new Date((new Date()).getTime() + hours * 3600000);
		expire = "; expires=" + expire.toGMTString();
	  }
	  document.cookie = name + "=" + escape(value) + expire;
	}
	function popup(src) {
		window.open( src, 'new_popup', 'height=550, width=760');
	}