function initMenu(){
	var mm = document.getElementById('main_menu');
	var links = mm.getElementsByTagName('A');
	for (var i=0; i<links.length; i++) {
		
		links[i].onmouseover=function() {
			
			var img = this.getElementsByTagName('IMG');
			img[0].src = img[0].src.replace(/\/off\//,'/hover/');
			
			//to use on state for hover (also see comment in mouseout state)
			//img[0].src = img[0].src.replace(/\/off\//,'/on/');
			
		}
		links[i].onmouseout=function() {
		
			var img = this.getElementsByTagName('IMG');
			img[0].src = img[0].src.replace(/\/hover\//,'/off/');
			
			//to use on state for hover (also see comment in mouseover state)
			//img[0].src = img[0].src.replace(/\/on\//,'/off/');
			
		}
		
		var img = links[i].getElementsByTagName('IMG');
		var preload = new Image(img[0].width,img[0].height);
		preload.src = img[0].src.replace(/\/off\//,'/hover/');
		
		
	}
}

function initSearchField(field){
	
}