function browserDefine()
{
	if(window.opera)
	{
		return "opera";
	}
	else if (window.Iterator)
	{
	    return "firefox2";
	}
	else if (Array.every)
	{
	    return "firefox1.5";
	}
	else if (document.compatMode && document.all && navigator.userAgent.indexOf("Netscape")==-1)
	{
    	return "msie";
	}
	//Netscape 8 as FireFox.
	else if (navigator.appName=="Netscape" && parseFloat(navigator.appVersion)>=4.7 && navigator.userAgent.indexOf("Netscape/8") > -1)
	{
		return "netscape8+";
	}
	//Netscape 8 as IE.
	else if (document.compatMode && document.all && navigator.userAgent.indexOf("Netscape/8") > -1)
	{
	    alert();
	    return "netscape8+";
	}
	
	else if (navigator.appName=="Netscape" && parseFloat(navigator.appVersion)>=4.7 && navigator.userAgent.indexOf("Netscape/8") == -1)
	{
	   return "netscape4.7+";
	}
	else
	{
		return "unknown";
	}
}