function backToTop() {
 var x1 = x2 = x3 = 0;
 var y1 = y2 = y3 = 0;
 if (document.documentElement) {
 x1 = document.documentElement.scrollLeft || 0;
 y1 = document.documentElement.scrollTop || 0;
 }
 if (document.body) {
 x2 = document.body.scrollLeft || 0;
 y2 = document.body.scrollTop || 0;
 }
 x3 = window.scrollX || 0;
 y3 = window.scrollY || 0;
 var x = Math.max(x1, Math.max(x2, x3));
 var y = Math.max(y1, Math.max(y2, y3));
 window.scrollTo(Math.floor(x / 1.4), Math.floor(y / 1.4));
 if (x > 0 || y > 0) {
 window.setTimeout("backToTop()", 1);
 }
}