var myURL = location.href;				// Save current url
var myDOM = document.domain;			//  and domain
var popup_state = 0;				// Pop-up state ( 1=on, 0=off)
															// If referrer is not self then do pop-up
if ((document.referrer.indexOf(myDOM) == -1) && (popup_state == 1)) {

	window1=window.open('Summer_camp.htm','messageWindow1','scrollbars=no,width=970,height=675,screenX=10,screenY=25,top=25,left=10')
	}