function disableField(fieldName) {
  /*var len = document.forms[0].elements.length;
  for (var i = 0; i < len; i++) {
    var name= document.forms[0].elements(i).name;
    if (name == fieldName) {
      document.forms[0].elements(i).disabled = true;
    }
  }
  */
  document.getElementsByName(fieldName)[0].disabled=true;
}

function enableField(arrOfFileds)
{
 for(var i=0; i<arrOfFileds.length; i++){
  var fldname = arrOfFileds[i];
  var isDisabled = isDisabled = document.all.item(fldname).disabled;
  if(isDisabled){
     document.all.item(fldname).disabled=false;
     document.all.item(fldname).style.backgroundColor="#FFFFFF";
  }else{
     document.all.item(fldname).disabled=true;
     document.all.item(fldname).style.backgroundColor="#DADADA";
  }
 }
}

function flipReadOnlyAttr(arrOfFileds)
{
 for(var i=0; i<arrOfFileds.length; i++){
  var fldname = arrOfFileds[i];
  var isReadOnly  = isDisabled = document.all.item(fldname).readOnly;
  if(isReadOnly){
     document.all.item(fldname).readOnly=false;
     document.all.item(fldname).style.backgroundColor="#FFFFFF";
  }else{
     document.all.item(fldname).readOnly=true;
     document.all.item(fldname).style.backgroundColor="#DADADA";
  }
 }
}

function changeReadOnlyAttr(arrOfFileds,flag)
{
 for(var i=0; i<arrOfFileds.length; i++)
{
  var fldname = arrOfFileds[i];
  if(!flag){
     document.all.item(fldname).readOnly=false;
     document.all.item(fldname).style.backgroundColor="#FFFFFF";
  }else{
     document.all.item(fldname).readOnly=true;
     document.all.item(fldname).style.backgroundColor="#DADADA";
  }
 }
}

function changeAllCheckboxes(par, par2)
{
  var ln=document.forms[0].elements.length;
  for(var i=0; i<ln; i++)
  {
    var name= document.forms[0].elements(i).name;
    if(name.substring(0, par.length) == par)
    {
      if(document.all.item(par2).checked==true)
        document.all.item(name).checked=true;
      else
        document.all.item(name).checked=false;
    }
  }

}
function clearAllCheckboxes(par)
{
  var ln=document.forms[0].elements.length;
  for(var i=0; i<ln; i++)
  {
    var name= document.forms[0].elements(i).name;
    if(name.substring(0, par.length) == par)
    {
     document.all.item(name).checked=false;
    }
  }

}

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

  return true;
}

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

function checkPhoneNumber(input) {
  var len1 = input.form[(getIndex(input) - 1) % input.form.length].value.length;
  var len2 = input.value.length;
  var len = len1 + len2;
  if (len == 0 || len == 10) return true;

  var message=document.all.item("phone_error").value;
  alert(message);

  input.form[(getIndex(input) - 1) % input.form.length].focus();

  return false;
}

function setTitle(obj)
{
  var name=obj.name;
  var t=obj.options[obj.selectedIndex].text;
  document.all.item(name).title.text=t;
}

function trim(str)
{
  return( (""+str).replace(/^\s*([\s\S]*\S+)\s*$|^\s*$/,'$1') );
}

function replaceLink(oldLink, newLink)
{
	for (var i=0; i<document.links.length; i++) {
        if (document.links[i].href == oldLink) {
        	document.links[i].href = newLink;
        }
    }
}

function isBlank(s) {
    for (var i=0; i< s.length; i++)  {
        var c = s.charAt(i);
        if ((c != ' ') && (c !='\n') && (c != '\t')) return false;
    }
    return true;
}