function comporiboleropopup(arg_url, arg_width, arg_height, arg_scrollbars, arg_resizeable) {
	var width  = arg_width;
	var height = arg_height;
	var resize = arg_resizeable?"yes":"no";
	var scrollb = arg_scrollbars?"yes":"no";
	
	if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4)) {
	
		var left 	= window.screenX + ((window.outerWidth - width) / 2);
		var top 	= window.screenY + ((window.outerHeight - height) / 2);
		var attr 	= "status=no,screenX=" + left + ",screenY=" + top + ","
			+",width=" +  width + ",height=" + height;

	} else {
		
		var left 	= (screen.width - width) / 2;
		var top 	= (screen.height - height) / 2;
		var attr 	= "left=" + left + ",top=" + top +",width=" + width + ",height="  + height;
	}
	attr += ",resizable="+resize;
	attr += ",scrollbars="+scrollb;
	var win = window.open( arg_url, "_blank", attr+",status=no");
	win.focus();
}