function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgOver') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;

function selectTab(tabId, areaId) {
	var tab = document.getElementById(tabId);
	var tabContainer = tab.parentNode;
	var area = document.getElementById(areaId);
	var tabNodes = tabContainer.childNodes;
	var tabNodeCnt = tabNodes.length;
	var areaNodes = area.parentNode.childNodes;
	var areaNodeCnt = areaNodes.length;
	var t, a;
	
	for (var i = 0; i < tabNodeCnt; i++) {
		t = tabNodes[i];
		
		if (t.tagName)
			t.className = (t.id == tabId) ? 'on' : '';
	}
	
	for (var i = 0; i < areaNodeCnt; i++) {
		a = areaNodes[i];
		
		if (a.tagName && a !== tabContainer)
			a.style.display = (a.id == areaId) ? 'block' : 'none';
	}
}