if(document.all && !document.getElementById) {
    document.getElementById = function(id) {
         return document.all[id];
    }
}
function layershow(object) {
  document.getElementById(object).style.visibility='visible';
}
function layerhide(object) {
  document.getElementById(object).style.visibility='hidden';
}
function layertop(object,top) {
  document.getElementById(object).style.top=top;
}
function layerleft(object,left) {
  document.getElementById(object).style.left=left;
}
function openWin (obj) {
 window.open (obj,"mywindow","top=0,left=0,location=0,status=0,scrollbars=0,width=830,height=810");
}