var isSF = false;
	var isNS = false;
	var isIE = false;
	var isOP = false;
	var isGE = false;
	
	determineBrowser();
	
	function determineBrowser(){
		if(navigator){
			if(navigator.userAgent){
				//alert(navigator.userAgent);
				if(navigator.userAgent.indexOf("Safari") != -1){
					//safari
					isSF = true;
				}else if(navigator.userAgent.indexOf("Netscape") != -1){
					//Netscape
					isNS = true;
				}else if(navigator.userAgent.indexOf("Opera") != -1){
					//Opera
					isOP = true;
				}else if(navigator.userAgent.indexOf("MSIE") != -1){
					//ie
					isIE = true;
				}else if(navigator.userAgent.indexOf("Gecko/") != -1){
					//Gecko
					isGE = true;
				}
			}
		}
	}