var root;

var naviImageArray = [
	{id : "btn_search", src : "/Products/top/images/btn_search"}
];

function setNaviEvent() {
	var imageSrc = document.getElementById("headerImg").getAttribute("src");
	root = imageSrc.slice(0, imageSrc.indexOf(""));
	for (var i = 0; i < naviImageArray.length; i++ ) {
		var ob = naviImageArray[i];
		var navi = document.getElementById(ob.id);
		setMouseEvent(navi, i);
	}
}
	
function setMouseEvent(elm, i) {
	if ( elm == undefined ) return;
	elm.onmouseover = function() {
		this.setAttribute("src", root + naviImageArray[i].src + "_on.gif");
	};
	
	elm.onmouseout = function() {
		this.setAttribute("src", root + naviImageArray[i].src + ".gif");
	};
}