/*
	Standards Compliant Rollover Script
	Author : Daniel Nolan
	http://www.bleedingego.co.uk/webdev.php
*/

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, '_ovr'+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('_ovr'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
			
		}
	}
	

}

//20080225フォーカス追加部分
function initFocuses(){
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aLinks = document.getElementsByTagName('a');
	
	for (var i = 0; i < aLinks.length; i++) {		
		if (aLinks[i].className == 'linkover') {
			var aImages = aLinks[i].getElementsByTagName('img');
			if(aImages[0] == null || aImages[0].length < 1) continue;
			
			if (aImages[0].className != 'imgover') continue;

			var src = aImages[0].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_ovr'+ftype);

			aImages[0].setAttribute('hsrc', hsrc);
			
			aPreLoad[0] = new Image();
			aPreLoad[0].src = hsrc;
			
			aLinks[i].onfocus = function() {
				sTempSrc = this.getElementsByTagName('img')[0].getAttribute('src');
				this.getElementsByTagName('img')[0].setAttribute('src', this.getElementsByTagName('img')[0].getAttribute('hsrc'));
			}	
			aLinks[i].onblur = function() {
				if (!sTempSrc) sTempSrc = this.getElementsByTagName('img')[0].getAttribute('src').replace('_ovr'+ftype, ftype);
				this.getElementsByTagName('img')[0].setAttribute('src', sTempSrc);
			}
		}
	}
}
//20080225追加部分


//window.onload = initRollovers;
try{
	window.addEventListener("load",initRollovers,false);
	window.addEventListener("load",initFocuses,false);
}catch(e){
	window.attachEvent("onload",initRollovers);
	window.attachEvent("onload",initFocuses);
}