//*******************************************************
//
// check browser
//
// return : 0 unknown, 1 Netscape, 2 IE, 3 Opera
//
//*******************************************************
var BrowserName = '';

checkBrowser();

function checkBrowser() {

	var brwsID = 0;
	
	// get browser name
	browserName = navigator.appName;
	
	// get agent name
	agentName = navigator.userAgent;

	// see if there is "Opera" in an agentName.
	nIdx = agentName.indexOf("Opera",0);
	
	if( nIdx != -1 ) { // it's Opera
		brwsID = 3;
		BrowserName = "OP";
	}
	else {
		// see if there is "MSIE" in an agentName.
		nIdx = agentName.indexOf("MSIE", 0);

		if( nIdx != -1 ) { // it's IE
			brwsID = 2;
			BrowserName = "IE";
		}
		else {
			// Netscape ?
			nIdx = agentName.indexOf("Mozilla/",0);

			if( nIdx != -1 ) { // it's Netscape
				brwsID = 1;
				BrowserName = "NS";
			}
			else { // unknown browser
				brwsID = 0;
				BrowserName = "UK";
			}
		}
	}

	return brwsID;
}