var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
    var keyCode = (isNN) ? e.which : e.keyCode; 
    var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];

    if(input.value.length >= len && !containsElement(filter,keyCode)) 


    {
        input.value = input.value.slice(0, len);
        input.form[(getIndex(input)+1) % input.form.length].focus();
    }


function containsElement(arr, ele) {
    var found = false, index = 0;
    while(!found && index < arr.length)
    if(arr[index] == ele)
    found = true;
else
    index++;
    return found;
}

function getIndex(input) {
    var index = -1, i = 0, found = false;
    while (i < input.form.length && index == -1)
    if (input.form[i] == input)index = i;
    else i++;
    return index;
    }

return true;
}

function fnTrapKD(btnID, event){
btn = findObj(btnID);
 if (document.all){
  if (event.keyCode == 13){
   event.returnValue=false;
   event.cancel = true;
   btn.click();
  }
 }
 else if (document.getElementById){
  if (event.which == 13){
   event.returnValue=false;
   event.cancel = true;
   btn.focus();
   btn.click();
  }
 }
 else if(document.layers){
  if(event.which == 13){
   event.returnValue=false;
   event.cancel = true;
   btn.focus();
   btn.click();
  }
 }
}

function findObj(n, d) { 
      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=findObj(n,d.layers[i].document);
      if(!x && d.getElementById) 
            x=d.getElementById(n); 
      return x;
  }