switch(Browser.Engine.name) {
			case 'trident':
				if(Browser.Engine.version < 4)
					return redirect = document.location.href = (URI.base.valueOf()+'browser_detect');
			case 'presto':
				if(Browser.Engine.version < 960)
					return redirect = document.location.href = (URI.base.valueOf()+'browser_detect');
			case 'webkit':
				if(Browser.Engine.version < 525)
					return redirect = document.location.href = (URI.base.valueOf()+'browser_detect');
			case 'gecko':
				if(Browser.Engine.version < 19)
					return redirect = document.location.href = (URI.base.valueOf()+'browser_detect');
		}