var rolloverFlg = true ;
$(function(){
	$(window).load(function(){ setRollover(); });
	$(".rollover").mouseover(function(){ rollover(this,true); });
	$(".rollover").mouseout(function(){  rollover(this,false); });
});

function rollover(obj,flg){
	if(rolloverFlg){
		return ;
	}
	if(flg){
		obj.src = obj.rolloverSrc;
	}else{
		obj.src = obj.defaultSrc;
	}
}

function setRollover(){
	var cFlg = "_ct";
	var oFlg = "_ov";
	rolloverObj = new Array();
	rolloverObj = $(".rollover").get();
	for(i=0;i<rolloverObj.length;i++){
		var tmpSrc = rolloverObj[i].src;
		// Set default Img
		rolloverObj[i].defaultSrc = rolloverObj[i].src;
		// Set rollover Img
		tmpArray = new Array();
		tmpArray = rolloverObj[i].src.split(".");
		var extension = "." + tmpArray[tmpArray.length-1];
		var tmpSrc = tmpSrc.replace(cFlg+extension,extension);
		var tmpSrc = tmpSrc.replace(oFlg+extension,extension);
		var rolloverImgUrl = tmpSrc.replace(extension,oFlg+extension);
		rolloverObj[i].rolloverSrc = rolloverImgUrl;
	}
	rolloverFlg = false ;
}