function validAmount(formField,fieldLabel,min,minLabel,max,maxLabel,required) {
    var result = true;
    var msg;
    if (required && !validRequired(formField,fieldLabel)) result = false;
    if (result) {
        var num = parseFloat(formField.value);
        if (isNaN(num)) {
        	msg = 'Please enter a number for the '+ fieldLabel +' field.';
        	result = false;
        } else {
	        if (min > 0) {
		        if (num < min) {
		            msg = 'Please enter an '+ fieldLabel +' of no less than ' + minLabel +'.';
		            result = false;
		        }
	        }
	        if (max > 0) {
		        if (num > max) {
		            msg = 'Please enter an '+ fieldLabel +' of no more than ' + maxLabel +'.';
		            result = false;
		        }
	        }
        }
		if (!result) {
	    	alert(msg);
	        formField.focus();
		}
    }
    return result;
}
function validPass(formPass,formVerify)
{
    var result = true;
    if (formPass.value != formVerify.value)
    {
        alert('The passwords you entered do not match.');
        formPass.focus();
        result = false;
    }
    return result;
}

function validChecked(formField,fieldLabel)
{
    var result = true;
    if (!formField.checked)
    {
        alert('You must check the "' + fieldLabel +'" checkbox.');
        formField.focus();
        result = false;
    }
    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;

}
function validLength(formField,fieldLabel,length,required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel)) result = false;
	if (result)	{
		var theStr = new String(formField.value);
		if (theStr.length != length) {
			alert('The "' + fieldLabel +'" field must be ' + length + ' characters.');
			formField.focus();
			result = false;
		}
	}
	return result;
}
function validRange(formField,fieldLabel,min,max,required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel)) result = false;
	if (result)	{
		var theStr = new String(formField.value);
		if (theStr.length > max || theStr.length < min) {
			alert('The "' + fieldLabel +'" field must be between ' + min + ' and ' + max + ' characters.');
			formField.focus();
			result = false;
		}
	}
	return result;
}
function validCC(formField,fieldLabel,required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel)) result = false;
	if (result)	{
		if (!allDigits(formField.value)) {
			alert('The "' + fieldLabel +'" field must be all numbers with no spaces or other characters.');
			formField.focus();
			result = false;
		}
	}
	if (result)	{
		var theStr = new String(formField.value);
		if (theStr.length > 16 || theStr.length < 13) {
			alert('The "' + fieldLabel +'" field must be between 13 and 16 numbers.');
			formField.focus();
			result = false;
		}
	}
	return result;
}
function validCCType(formField,fieldLabel,formCC) {
	var result = true;
	if (!validRequired(formField,fieldLabel)) {
		result = false;
	} else {
		var theStr = new String(formCC.value);
		if (theStr.charAt(0) != formField.value) {
			alert('The Card Number does not match the Card Type.');
			formField.focus();
			result = false;
		}
	}
	return result;
}
function validNum(formField,fieldLabel,required) {
	var result = true;
	if (required && !validRequired(formField,fieldLabel)) result = false;
	if (result) {
		if (!allDigits(formField.value)) {
			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();
			result = false;
		}
	}
	return result;
}
function validInt(formField,fieldLabel,required)
{
    var result = true;

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

    if (result)
    {
        var num = parseInt(formField.value,10);
        if (isNaN(num))
        {
            alert('Please enter a number for the "' + fieldLabel +'" field.');
            formField.focus();
            result = false;
        }
    }

    return result;
}


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

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

    if (result)
    {
        var elems = formField.value.split("/");

        result = (elems.length == 3); // should be three components

        if (result)
        {
            var month = parseInt(elems[0],10);
            var day = parseInt(elems[1],10);
            var year = parseInt(elems[2],10);
            result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
                     allDigits(elems[1]) && (day > 0) && (day < 32) &&
                     allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
        }

        if (!result)
        {
            alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
            formField.focus();
        }
    }

    return result;
}

function allDigits(str)
{
    return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
    var result = true;

    // Note: doesn't use regular expressions to avoid early Mac browser bugs
    for (var i=0;i<str.length;i++)
        if (charset.indexOf(str.substr(i,1))<0)
        {
            result = false;
            break;
        }

    return result;
}

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;
}