/************************************************
  
    Site Name: Coca-Cola
	Description: rollover
	Version: 1.02
	Author: m.yamaki
	Last Modified : 2008.02.04

************************************************/

/* ロールオーバー
------------------------------------------*/
function rollOverInit() {
	var targetNodes = document.getElementsByClassName("js_rollover");
	var imgPreload = new Array();
	
	for (var i=0; i<targetNodes.length; i++) {
		var targetNode = targetNodes[i]
		// プリロード
		imgPreload[i] = new Image();
		var imgSrc = targetNode.src;
		if (imgSrc.indexOf(".jpg") == -1) {
			var imgPreloadSrc = imgSrc.slice(0, imgSrc.indexOf("_off.gif")) + "_on.gif";
		} else {
			var imgPreloadSrc = imgSrc.slice(0, imgSrc.indexOf("_off.jpg")) + "_on.jpg";
		}
		imgPreload[i].src = imgPreloadSrc;
				
		// イベント設定
		targetNode.onmouseover = function() {			
			var oldsrc = this.src;
			var indexNum = oldsrc.indexOf("_off.");
			
			if (indexNum != -1) {
				if (oldsrc.indexOf(".jpg") == -1) {
					var newsrc = oldsrc.slice(0, indexNum) + "_on.gif";
				} else {
					var newsrc = oldsrc.slice(0, indexNum) + "_on.jpg";
				}
				this.src = newsrc;
			}
		};
		
		targetNode.onmouseout = function() {
			var oldsrc = this.src;
			var indexNum = oldsrc.indexOf("_on.");
			
			if (indexNum != -1) {
				if (oldsrc.indexOf(".jpg") == -1) {
					var newsrc = oldsrc.slice(0, indexNum) + "_off.gif";
				} else {
					var newsrc = oldsrc.slice(0, indexNum) + "_off.jpg";
				}
				this.src = newsrc;
			}
		};
		
	}

}



Event.observe(window, "load", rollOverInit, false);