//==============================================================================
//form validation
//==============================================================================
function ValidateForm(form)
{
	if (form.mk.value == '')
		{
			alert('You must select a vehicle make to continue');
			form.mk.focus();
			return false;
		}
	
		if ((form.zc.value == '') || (form.zc.value.length < 5))
		{
			alert('You must enter a valid Zip Code to continue');
			form.zc.focus();
			form.zc.select();
			return false;
		}
		
	return true;	
}
//==============================================================================
// VALIDATE E-MAIL
//==============================================================================
function val_email(field) 
{
  var str = field.value; // email string
  var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
  var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid

	if (str != "")
	{
		if (!reg1.test(str) && reg2.test(str)) 
		{ 
			// if syntax is valid
			return true;
		}
			//if is invalid
			alert("\"" + str + "\" is an invalid E-mail! eg: username@domain.com'"); // this is also optional
			field.focus();
			field.select();
			return false;
	}
}


//==============================================================================
// VALIDATE NUMBER
//==============================================================================
function val_num(field) 
{
	//change here if needed
	var valid = "0123456789"
	var ok = "yes";
	var temp;
	
	for (var i=0; i<field.value.length; i++) 
	{
		temp = "" + field.value.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") ok = "no";
	}
	
	if (ok == "no") 
	{
		alert("Only numbers are accepted!");
		field.focus();
		field.select();
	}
}


//==============================================================================
// LOAD N/A IMAGES ON PRE-OWNED AND NEW CAR DETAIL PAGE IN CASE IMAGE IS NOT IN DEALERQQ
//==============================================================================
function LoadNaPic()
{	
	document.all.car_pic.src = "graphics/na.jpg"
}