function getnav()
{
	var strnav = "";
	var navigateur; 
	var strUA ="";
	navigateur = new Array("opera","netscape 8","Navigator/9","firefox","msie");  
	strUA = window.navigator.userAgent.toLowerCase() ;
	
	for(var indice=0;indice < navigateur.length; indice++)
	{    
	     switch(navigateur[indice])
	      {
	        case "msie":
				strnav = strUA.match(/msie/i) + "";  //  object to string 
				if(strnav == "msie")
				return "msie";
			    break;
			case "netscape 8":    
				strnav = strUA.match(/netscape/i) + "";
				if(strnav == "netscape")
				return "netscape";
				break;
			case "Navigator/9":    
				strnav = strUA.match(/navigator\/9/i) + "";
				if(strnav == "navigator/9")
				return "netscape";
				break;
			case "firefox":
				strnav = strUA.match(/firefox/i) + "";
				if(strnav == "firefox")
				return "firefox";
			    break;
			case "opera":
			   strnav = "";	
			   try{
			    if(window.opera)
				strnav = "opera"
				}catch(e){};
				if(strnav == "opera")
					return strnav;
				break;
		 }	
		
	}
	return "";
}