ImageData = new Array("img/hasu.jpg","img/hasu2.jpg","img/hasu3.jpg","img/hasu4.jpg");
	function ChangeImg(obj){
	if(obj.src.indexOf(ImageData[0])!=-1){
		obj.src=ImageData[1];
		}else if(obj.src.indexOf(ImageData[1])!=-1){
	        obj.src=ImageData[2];
		}else if(obj.src.indexOf(ImageData[2])!=-1){
		obj.src=ImageData[3];
		}else if(obj.src.indexOf(ImageData[3])!=-1){
		obj.src=ImageData[0];
	    }
	}