function validate_search (form)
{

  if (form.keyword.value == "")
  {
    alert("Please enter a value for the \"search\" field.");
    form.keyword.focus();
    return (false);
  }

  if (form.keyword.value.length < 3)
  {
    alert("Please enter at least 3 characters in the \"search\" field.");
    form.keyword.focus();
    return (false);
  }

  if (form.keyword.value.length > 30)
  {
    alert("Please enter at most 30 characters in the \"search\" field.");
    form.keyword.focus();
    return (false);
  }

  return (true);
}

function validate_draper_dsn(form) {
	dsn = form.dsn;
	if (dsn.value =="" || dsn.value.length<3) {
		alert ("Please enter at least three digits of the Draper Stock No.");
		dsn.focus();
		return false;

	}
	return true;
}

function validate_draper_desc(form) {
	desc = form.desc;
	if (desc.value =="" || desc.value.length<5) {
		alert ("Please enter at least five characters of the description.");
		desc.focus();
		return false;
	}
	return true;
}

function validate_draper(form) {
	dsn = form.dsn.value;
	desc = form.desc.value;
	if (dsn == "" && desc == "") {
		alert ("Please enter a product to search for.");
		form.dsn.focus();
		return false;
	}
	if (desc == "" && dsn.length<3) {
		alert ("Please enter at least three digits of the Draper Stock No.");
		form.dsn.focus();
		return false;
	}
	if (dsn == "" && desc.length<5) {
		alert ("Please enter at least five characters of the description.");
		form.desc.focus();
		return false;
	}
	return true;
}

function validate_sealey(form) {
	if (form.search.value=="" || form.search.length < 3 ) {
		alert ("Please enter at least four characters to search for");
		form.search.focus();
		return false;
	}
	return true;
}

function clearField(input) {
	if (input.checked==false) {
		input.value='';
		input.checked=true;
	} 
}