var Ver4 = parseInt(navigator.appVersion) >= 4
	var Nav4 = ((navigator.appName == "Netscape") && Ver4)
	var IE4 = ((navigator.userAgent.indexOf("MSIE") != -1) && Ver4)

	function pop_win(loc, win, wd, ht, scroll) {
		if(scroll == '') scroll = 'yes';
  		popwin = window.open(loc,win,"width="+wd+",height="+ht+",toolbar=no,resizable=yes,scrollbars="+scroll);
 	}