//	SemSrg	August 16, 2001

function ListSetCurrent(obj, value, defValue)
{
	if(value != null && value != "") {
		for(i=0;i<obj.options.length;i++) {
			if(obj.options[i].value==value) {
				obj.selectedIndex=i;
			}
		}
	}
	if(defValue != null) obj.selectedIndex = defValue;	
}

function RadioGetCurrent(obj)
{
	for(var i=0;i<obj.length;i++) if(obj[i].checked == true) return i;
	return -1;
}

function RadioSetCurrent(obj, value, defItem)
{
	for(var i=0;i<obj.length;i++) {
		if(obj[i].value == value) {
			obj[i].checked = true;
			return;
		}
	}
	if(defItem != null && defItem < obj.length) obj[defItem].checked = true;
}

function round(number,X)
{
	X = (!X ? 2 : X);
	return Math.round(number*Math.pow(10,X))/Math.pow(10,X);
}

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=0; i < obj.length; i++) if (obj.options[i].selected && obj.options[i].value != "")	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)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0) return true;

    //Returns true if value is an integer defined as
    //   having an optional leading + or -.
    //   otherwise containing only the characters 0-9.
	var decimal_format = ".";
	var check_char;

    //The first character can be + -  blank or a digit.
	check_char = object_value.indexOf(decimal_format)
    //Was it a decimal?
    if (check_char < 1)	return checknumber(object_value);
    else return false;
    }



function checknumber(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0) return true;

    //Returns true if value is a number defined as
    //   having an optional leading + or -.
    //   having at most 1 decimal point.
    //   otherwise containing only the characters 0-9.
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;

    //The first character can be + - .  blank or a digit.
	check_char = start_format.indexOf(object_value.charAt(0))
    //Was it a decimal?
	if (check_char == 1) decimal = true;
	else if (check_char < 1) return false;
        
	//Remaining characters can be only . or a digit, but only one decimal.
	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;
        // ignore leading blanks
		}
        else if (trailing_blank) return false;
		else digits = true;
	}	
    //All tests passed, so...
    return true
    }


function checkzip(object_value)
    {
    if (object_value.length == 0) return false;
    if (object_value.length != 5 && object_value.length != 10) return false;

	// make sure first 5 digits are a valid integer
	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;
	
	// make sure

	// check if separator is either a'-' or ' '
	if (object_value.charAt(5) != "-" && object_value.charAt(5) != " ")  return false;

	// check if last 4 digits are a valid integer
	if (object_value.charAt(6) == "-" || object_value.charAt(6) == "+")  return false;
	return (checkinteger(object_value.substring(6,10)));
    }


function checkcreditcard(object_value)
    {
	var white_space = " -";
	var creditcard_string="";
	var check_char;

	// squish out the white space
	for (var i = 0; i < object_value.length; i++)
	{
		check_char = white_space.indexOf(object_value.charAt(i))
		if (check_char < 0)	creditcard_string += object_value.substring(i, (i + 1));
	}	

	// if all white space return error
    if (creditcard_string.length == 0) return false;
	 	
	// make sure number is a valid integer
	if (creditcard_string.charAt(0) == "+")  return false;
	if (!checkinteger(creditcard_string)) return false;

    // now check mod10
	var doubledigit = creditcard_string.length % 2 == 1 ? false : true;
	var checkdigit = 0;
	var tempdigit;

	for (var i = 0; i < creditcard_string.length; i++)
	{
		tempdigit = eval(creditcard_string.charAt(i))

		if (doubledigit)
		{
			tempdigit *= 2;
			checkdigit += (tempdigit % 10);

			if ((tempdigit / 10) >= 1.0) checkdigit++;
			doubledigit = false;
		}
		else
		{
			checkdigit += tempdigit;
			doubledigit = true;
		}
	}	
	return (checkdigit % 10) == 0 ? true : false;
}