function imgOverGif(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+"-over.gif";
	}
	function imgOutGif(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+".gif";
	}
	function imgOverPng(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+"-over.png";
	}
	function imgOutPng(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+".png";
	}
	function imgOverJpg(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+"-over.jpg";
	}
	function imgOutJpg(imgName){
		document.getElementById(imgName).src="assets/img-design/"+imgName+".jpg";
	}