var activeItem;
var menuImageRootUrl;

if (typeof($) != 'undefined') {
	$(document).ready(function(){

		$('#mainmenu a').mouseover(function(){
			rollover(this.id.replace('menu',''));
		});
		
		$('#mainmenu a').mouseout(function(){
			rollout(this.id.replace('menu',''));
		});
		
	});
} else {
	alert ('menu error: jquery was not included!');
}


function rollover(menuid) {
    if (activeItem != menuid) {
        var imgID = 'mnuitem'+menuid;
        var img = document.getElementById(imgID);
        img.src = img.src.replace('idle','active');
    }
}

function rollout(menuid) {
	if (activeItem != menuid) {
    	var imgID = 'mnuitem'+menuid;
	    var img = document.getElementById(imgID);
	    img.src = img.src.replace('active','idle');
	}
}

function activeMnuItem(imgnum, index) {
	activeItem = imgnum;
	
	if (index > 0) {
	    //first image (homepage) has no activated state
	    var imgID = 'mnuitem'+imgnum;
	    var img = document.getElementById(imgID);
	    img.src = img.src.replace('idle','active');
	}
}