var focusSet=false;

function InvalidField(field)
{
	if (eval("document.forms[0]." + field + ".value") =="")
	{
		if (!focusSet)
			{
				focusSet = true;
				eval("document.forms[0]." + field + ".focus();")
			}
		return true;
		}
	else
		return false;
}

function onError(obj,error_message)
{
	obj.focus();
	alert(error_message);
	return false;	
}

function onErrorNoFocus(obj,error_message)
{
	alert(error_message);
	return false;	
}

function hasValue(obj, obj_type)
{
	if (obj_type == "TEXT" || obj_type == "PASSWORD")
	{
		if (obj.value.length == 0) 
	  		return false;
		else 
	  		return true;
	}
	else if (obj_type == "SELECT")
	{
		for (i=1; i < obj.length; i++)
		{
			if (obj.options[i].selected)
				return true;
		}
	   	return false;	
	}
	else if (obj_type == "SINGLE_VALUE_RADIO" || obj_type == "SINGLE_VALUE_CHECKBOX")
	{
		if (obj.checked)
			return true;
		else
	   		return false;	
	}
	else if (obj_type == "RADIO" || obj_type == "CHECKBOX")
	{
		for (i=0; i < obj.length; i++)
		{
			if (obj[i].checked)
				return true;
		}
	   	return false;	
	}
}


function checkinteger(object_value)
{
	if (object_value.length == 0)
		return true;
	var decimal_format = ".";
	var check_char = object_value.indexOf(decimal_format);
	if (check_char == -1)
		return checknumber(object_value);
	else
		return false;
}


function numberrange(object_value, min_value, max_value)
{
	if (min_value != null)
	{
		if (object_value < min_value)
			return false;
	}
	if (max_value != null)
	{
		if (object_value > max_value)
			return false;
	}
	return true;
}


function checknumber(object_value)
{
	if (object_value.length == 0)
		return true;
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;
	check_char = start_format.indexOf(object_value.charAt(0));
	if (check_char == 1)
		decimal = true;
	else if (check_char < 1)
		return false;
	for (var i = 1; i < object_value.length; i++)
	{
		check_char = number_format.indexOf(object_value.charAt(i));
		if (check_char < 0)
			return false;
		else if (check_char == 1)
		{
			if (decimal)
				return false;
			else
				decimal = true;
		}
		else if (check_char == 0)
		{
			if (decimal || digits)	
				trailing_blank = true;
		}
		else if (trailing_blank)
			return false;
		else
			digits = true;
	}	
	return true
}


function checkrange(object_value, min_value, max_value)
{
	if (object_value.length == 0)
		return true;
	if (!checknumber(object_value))
		return false;
	else
		return (numberrange((eval(object_value)), min_value, max_value));
	return true;
}


function checkphone(object_value)
{
	if (object_value.length == 0)
		return true;
	if (object_value.length != 12)
		return false;
	if (!checknumber(object_value.substring(0,3)))
		return false;
	else if (!numberrange((eval(object_value.substring(0,3))), 100, 1000))
		return false;
	if (object_value.charAt(3) != "-" && object_value.charAt(3) != " ")
		return false
	if (!checknumber(object_value.substring(4,7)))
		return false;
	else if (!numberrange((eval(object_value.substring(4,7))), 100, 1000))
		return false;
	if (object_value.charAt(7) != "-" && object_value.charAt(7) != " ")
		return false;
	if (object_value.charAt(8) == "-" || object_value.charAt(8) == "+")
		return false;
	else
		return (checkinteger(object_value.substring(8,12)));
}


function checkzip(object_value)
{
	if (object_value.length == 0)
		return true;
	if (object_value.length != 5 && object_value.length != 10)
		return false;
	if (object_value.charAt(0) == "-" || object_value.charAt(0) == "+")
		return false;
	if (!checkinteger(object_value.substring(0,5)))
		return false;
	if (object_value.length == 5)
		return true;
	if (object_value.charAt(5) != "-" && object_value.charAt(5) != " ")
		return false;
	if (object_value.charAt(6) == "-" || object_value.charAt(6) == "+")
		return false;
	return (checkinteger(object_value.substring(6,10)));
}

function checkemail (EmailField) 
{
var EmailStr = EmailField;
var EmailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=EmailStr.match(EmailPat)
if (matchArray==null) {
	alert("Email adress error\nEmail address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
    alert("The username doesn't seem to be valid.")
    return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Email adress error\nDestination IP address is invalid!")
		return false
	    }
    }
    return true
}
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("Email adress error\nThe domain name doesn't seem to be valid.")
    return false
}
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   alert("Email adress error\nThe address must end in a three-letter domain, or two letter country.")
   return false
}
return true;
}


function setFormParam( strFormName, strParamName, strParamValue )
{
	var strObjName = "document." + strFormName + "." + strParamName;
	var obj = eval( strObjName );
	obj.value = strParamValue;
	return true;
}


function checkregex(object_value, regex)
{
	return regex.test(object_value);
}