function changeBtImage(Image) {
            var Btimg = document.getElementById(Image);
            var imgsrc = "Images/" + Image + "Over.png";
            Btimg.setAttribute("src", imgsrc);
 
        }
        function changeBtImageOut(Image) {
            var Btimg = document.getElementById(Image);
            var imgsrc = "Images/" + Image + ".png";
            Btimg.setAttribute("src", imgsrc);
 
        }