function switchFrame( reqFrame ) {
	if(reqFrame){
		$('model_info_window_nav').childElements().each(function(element){
			var clickText = element.readAttribute('onclick');
			var re = new RegExp(reqFrame);
			if(clickText){
				var m = clickText.match(re);
				if(m){
					rollover_nav_on(element);
				}else{
					rollover_nav_off(element);
				}
			}
		});
		$('model_info_window_bottom').childElements().each(function(element){
			if(element.id == reqFrame){
				element.show();
			}else{
				element.hide();
			}
		});
	}

}