var downStrokeField;

function autojump(fieldName,nextFieldName,fakeMaxLength){
var myForm=document.forms[document.forms.length - 1];
var myField=myForm.elements[fieldName];
myField.nextField=myForm.elements[nextFieldName];

if (myField.maxLength == null)
   myField.maxLength=fakeMaxLength;

myField.onkeydown=autojump_keyDown;
myField.onkeyup=autojump_keyUp;
}

function autojump_keyDown(){
this.beforeLength=this.value.length;
downStrokeField=this;
}

function autojump_keyUp(){
if (
   (this == downStrokeField) && 
   (this.value.length > this.beforeLength) && 
   (this.value.length >= this.maxLength)
   )
   this.nextField.focus();
downStrokeField=null;
}

function CheckFormRadio(){
  var i,a,found;
  
  found = false;
  
  for(i=0;i<document.form1.cond.length;i++)
    if (document.form1.cond[i].checked==true){
      a = document.form1.cond[i].value;
      found = true;
    }
      
  if (found == false){
    alert('Please select the condition of your vehicle.');
    return false;
  }
  else {
    document.form1.cond.value = a;
    return true;
  }
}

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
        result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
        var result = true;
        if (formField.value == "")
        {
                alert('Please enter a value for the "' + fieldLabel +'" field.');
                formField.focus();
                result = false;
        }
        return result;
}

function validEmail(formField,fieldLabel,required)
{
        var result = true;

        if (required && !validRequired(formField,fieldLabel))
                result = false;

        if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
        {
                alert("Please enter a complete email address in the form: yourname@yourdomain.com");
                formField.focus();
                result = false;
        }
        return result;
}