function browserDetect() {
	var browserNames=new Array("Opera", "MSIE","Netscape","Firefox");
	this.name="NK";
	this.mainVersion="NK";
	this.minorVersion="NK";
 
	for (var i=0; i< browserNames.length; i++){
	  var pattern='('+browserNames[i]+')'+'.([0-9]+)\.([0-9]+)';    
	  var myRegExp=new RegExp(pattern);
	  if (myRegExp.test(navigator.userAgent)){
		 var results=myRegExp.exec(navigator.userAgent);
		 this.name=results[1];
		 this.mainVersion=results[2];
		 this.minorVersion=results[3];	 
		 break;
	   }
	} 
}

var browser = new browserDetect();

//document.write(browser.name);