function BrowserDetectLite() {
   var ua = navigator.userAgent.toLowerCase(); 

   this.isIE        = ( (ua.indexOf('msie') != -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) ); 
   this.isOpera     = (ua.indexOf('opera') != -1); 
   
   this.versionMajor = parseInt(this.versionMinor); 
   
   this.isDOM1 = (document.getElementById);

   this.isMac   = (ua.indexOf('mac') != -1);
}
var browser = new BrowserDetectLite();

function initMenu(){
    if ( browser.isDOM1 
    && !( browser.isMac && browser.isIE ) 
    && !( browser.Opera && browser.versionMajor < 7 )
    && !( browser.isIE && browser.versionMajor < 5 ) )
    {
        var nav = document.getElementById('nav');
        var nava = nav.getElementsByTagName('a');
        
		for ( var i=0; i<nava.length; i++ ){
			var num = i + 1;            
			nava[i].className="a" + num;
        }
		
		if (document.getElementById('wines')){
			var wines = document.getElementById('wines');
        	var winesa = wines.getElementsByTagName('a');
        
			for ( var j=0; j<winesa.length; j++ ){
				var num2 = j + 1;            
				winesa[j].className="a" + num2;
				addAnEvent(winesa.item(j),'mouseover',switchwine);
				addAnEvent(winesa.item(j),'mouseout',switchwineoff);
        	}
		}
    }
}
function addAnEvent( target, eventName, functionName ){
    eval('target.on'+eventName+'=functionName');
}

function switchwine(){
	var wine = "";
	switch(this.className){
		case 'a1':
			wine = "cabernetsauvignon";
			break;
		case 'a2':
			wine = "chardonnay";
			break;
		case 'a3':
			wine = "merlot";
			break;
		case 'a4':
			wine = "pinotnoir";
			break;
		case 'a5':
			wine = "shiraz";
			break;
			
	}
	document.getElementById('winebottle').src = "img/winebottle-" + wine + ".gif";
}

function switchwineoff(){
	document.getElementById('winebottle').src = "img/h-winebottle.gif";
}

window.onload=initMenu;