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 null;
	  }
	  function redirect(cookieName, address) {
		  if (getCookie(cookieName)==null) {
			  // open a new window
			  window.open(address,'mywindow','location=0,status=0,scrollbars=0,width=350,height=350');
			  // mywindow.moveTo(0,0);
		  } else {
			  // User has already registered
			  window.location=address;
		  }
	  }