function lowercase()
{
        var dir = form1.file_name.value;
        dir = dir.toLowerCase();
        form1.file_name.value = dir;
}

function skip () { this.blur(); }

function toggleSelect (select) {
  if (!select.disabled) {
    select.disabled = true;
    if (!document.all && !document.getElementById) {
      select.oldOnFocus =
        select.onfocus ? select.onfocus : null;
      select.onfocus = skip;
    }
  }
  else {
    select.disabled = false;
    if (!document.all && !document.getElementById) {
      select.onfocus = select.oldOnFocus;
    }
  }
}


function switch_layer(id)
{
    var maincell = document.getElementById("main");
    var layerlist = maincell.getElementsByTagName("div");

    var i = 0;
    for (i = 0; i < layerlist.length; i++)
    {
        layerlist[i].className = "clayer_hidden";
    }
    document.getElementById(id).className = "clayer_shown";
}

function swithhome(id)
{
    var maincell = document.getElementById("main1");
    var layerlist = maincell.getElementsByTagName("div");

    var i = 0;
    for (i = 0; i < layerlist.length; i++)
    {
        layerlist[i].className = "clayer_hidden";
    }
    document.getElementById(id).className = "clayer_shown";
}