$(function(){
imgRoll();
});

/*---------------
image rollover
----------------*/
function imgRoll(){
	var outImgName = "_ovoff";
	var overImgName = "_ovon";
	var preload = new Array();

	if(document.getElementsByTagName){
		var imgTagData = document.getElementsByTagName("img");
		var reOverImg = new RegExp(outImgName + "+(\.[a-z]+)$");
		var reOutImg = new RegExp(overImgName + "+(\.[a-z]+)$");

		for(var i=0; i<imgTagData.length; i++){
			if(imgTagData[i].getAttribute("src").match(reOverImg)){
				preload[i] = new Image();
				preload[i].src = imgTagData[i].getAttribute("src").replace(reOverImg, overImgName + "$1");
	
				imgTagData[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace(reOverImg, overImgName + "$1"));
				}
	
				imgTagData[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace(reOutImg, outImgName + "$1"));
				}
			}
		}
	}
	
	if(document.getElementsByTagName){
		var inputTagData = document.getElementsByTagName("input");
		var reOverImg = new RegExp(outImgName + "+(\.[a-z]+)$");
		var reOutImg = new RegExp(overImgName + "+(\.[a-z]+)$");
	
		for(var i=0; i<inputTagData.length; i++){
			if(inputTagData[i].src && inputTagData[i].getAttribute("src").match(reOverImg)){
				preload[i] = new Image();
				preload[i].src = inputTagData[i].getAttribute("src").replace(reOverImg, overImgName + "$1");
	
				inputTagData[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace(reOverImg, overImgName + "$1"));
				}
	
				inputTagData[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace(reOutImg, outImgName + "$1"));
				}
			}
		}
	}
}