var __MSIE = 1;var __MSIE7 = 2;var __GECKO = 3;var __OPERA = 4;
function IsBrowser(){
	if(navigator){
		if(navigator.userAgent){
			if(navigator.userAgent.indexOf("MSIE 7")!=-1) return __MSIE7;
			if(navigator.userAgent.indexOf("MSIE")!=-1) return __MSIE;
			if(navigator.userAgent.indexOf("Gecko")!=-1) return __GECKO;
			if(navigator.userAgent.indexOf("Opera")!=-1) return __OPERA;
		}
	}
}