//ロールオーバーイメージ（画像）

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

function initRollovers() {
	if(!document.getElementById) return false;
	if(!document.getElementsByTagName) return false;
	
	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, '_o'+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('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}


//ロールオーバーイメージ（フォームボタン）

function inputRollovers() {
	if(!document.getElementById) return false;
	if(!document.getElementsByTagName) return false;

	var aPreLoad = new Array();
	var sTempSrc;
	var aInputs = document.getElementsByTagName('input');
	
	for (var j=0; j<aInputs.length; j++) {
		if(aInputs[j].className == 'imgover') {
			var src = aInputs[j].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);

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

//ページの読み込みが完了したらファンクションを実行

function addLoadEvent(func) {
	var oldonload = window.onload;
	if(typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(initRollovers);
addLoadEvent(inputRollovers);
//addLoadEvent(prepareLinks);
//addLoadEvent(popUpWin);