function rollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", rollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", rollover);
}

/* rollover for focusarea */
function focusImg(name,sw) {
	if(sw != 'on' && sw != 'off' ) return;
	var imgA = new Image();
	imgA.src = '/img/focus_' + name + '_i_' + sw +'.jpg';
	var imgB = new Image();
	imgB.src = '/img/focus_' + name + '_' + sw +'.jpg';
	
	var imgNameA = name + '_a';
	var imgNameB = name + '_b';
	
	if (document.images) {
		document.images[imgNameA].src = imgA.src;
		document.images[imgNameB].src = imgB.src;
	}
}