//rollover script starts here-------
var cur_btn = [];

//preload images
function loadImg(path, imgName) {
	if (document.images) {
		var img = new Image();
		img.src = path + imgName + "_over.gif";
	}
}

function setCurBtn(path, imgName) {
	cur_btn.push(imgName);
	
	// alert(imgName);
	/* 
	if (document.images) {
		var img_path = path + imgName + "_on.gif";
		var img = new Image();
		img.src = img_path;
  		document[imgName].src = img_path;
	}*/
}

//rollover On state
function imgOn(path, imgName) {
	// alert("imgName: " + imgName + ", cur_btn: " + cur_btn);
	if (document.images) {
		var len = cur_btn.length;
		var flag = true;
		for(var i=0; i<len; i++){
			if ((imgName == cur_btn[i])) {
				flag = false;
			}
		}
		if (flag) {
			document[imgName].src = path + imgName + "_over.gif";
		}
	}
}

//rollover Off state
function imgOff(path, imgName) {
	if (document.images) {
		var len = cur_btn.length;
		var flag = true;
		for(var i=0; i<len; i++){
			if ((imgName == cur_btn[i])) {
				flag = false;
			}
		}
		if (flag) {
			document[imgName].src = path + imgName + "_off.gif";
		}
	}
}