bBackspaceNextTime = 0;
  function FixCase(oEvent, oField, oNextField, oPrevField)
  {
   // window.status = oEvent.keyCode;

    switch (oEvent.keyCode)
    {
      case (8):  // backspace
      {
        if (oField.value.length == 0)
        {
          if (oPrevField && bBackspaceNextTime == 1) {
            oPrevField.focus();
            oPrevField.value = oPrevField.value.substring(0, oPrevField.value.length - 1);
            bBackspaceNextTime = 0;
          }
          else {
            bBackspaceNextTime = 1;
          }
        }
        return;
      }
      case (9):  // tab key
      case (16):  // tab key
      case (46): // delete
      case (37): // left arrow
      case (38): // up arrow
      case (39): // right arrow
      case (40): // down arrow
      {
        return;
      }
    }

    a = new Array(4);
    for (i=0; i<4; i++) {
      a[i] = oField.value.charAt(i).toUpperCase();
      if (a[i] == "I") {
        a[i] = "1";
      }
      if (a[i] == "O") {
        a[i] = "0";
      }
    }

    oField.value = a[0]+a[1]+a[2]+a[3];
    if (oField.value.length > 3) {
      if (oNextField) {
        oNextField.focus();
        if (oNextField != oField) {
          oNextField.select();
        }
      }
      bBackspaceNextTime = 1;
    }
    else {
      bBackspaceNextTime = 0;
    }
  }
function submitForm() {
	document.mainform.submit();
}

<!--
function visi(nr)
{
	if (document.layers)
	{
		vista = (document.layers[nr].visibility == 'hide') ? 'show' : 'hide'
		document.layers[nr].visibility = vista;
	}
	else if (document.all)
	{
		vista = (document.all[nr].style.visibility == 'hidden') ? 'visible'	: 'hidden';
		document.all[nr].style.visibility = vista;
	}
	else if (document.getElementById)
	{
		vista = (document.getElementById(nr).style.visibility == 'hidden') ? 'visible' : 'hidden';
		document.getElementById(nr).style.visibility = vista;

	}
}

function blocking(nr)
{
	if (document.layers)
	{
		current = (document.layers[nr].display == 'none') ? 'block' : 'none';
		document.layers[nr].display = current;
	}
	else if (document.all)
	{
		current = (document.all[nr].style.display == 'none') ? 'block' : 'none';
		document.all[nr].style.display = current;
	}
	else if (document.getElementById)
	{
		vista = (document.getElementById(nr).style.display == 'none') ? 'block' : 'none';
		document.getElementById(nr).style.display = vista;
	}
}
function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->