var whitespace = " \t\n\r";


function sqlSafe(s)
{
    var new_s = s;
    new_s = replaceAll(new_s, "'", "|");
    new_s = replaceAll(new_s, "|", "''");
    new_s = replaceAll(new_s, "\"", "|");
    new_s = replaceAll(new_s, "|", "''");
    return new_s;
}


function stripHTML() {
    var re = /<\S[^><]*>/g
    for (i = 0; i < arguments.length; i++)
        arguments[i].value = arguments[i].value.replace(re, "")
}


/****************************************************************/

function makeSafe(i)
{
    i.value = sqlSafe(i.value);
}

/****************************************************************/

// Check whether string s is empty.

function isEmpty(s)
{
    return ((s == null) || (s.length == 0))
}

/****************************************************************/

// Returns true if string s is empty or
// whitespace characters only.

function isWhitespace(s)

{
    var i;

    // Is s empty?
    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);

        if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}

/****************************************************************/


function passwordsCheck(s1, s2) {
    if (isWhitespace(s1)) {
        alert("Please enter a valid password");
        return false;
    }
    if (s1 != s2) {
        alert("Both the passwords entered must be the same");
        return false;
    }
    return true;
}

function isEmail(s)
{
    if (isEmpty(s))  return false;
    //       if (isEmail.arguments.length == 1) return defaultEmptyOK;
    //       else return (isEmail.arguments[1] == true);

    // is s whitespace?
    if (isWhitespace(s)) return false;

    // there must be >= 1 character before @, so we
    // start looking at character position 1
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    {
        i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    {
        i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else

    //    makeSafe(s);
        return true;
}

/****************************************************************/

// Checks to see if a required field is blank.  If it is, a warning
// message is displayed...

function ForceEntryAndDisplayAlert(objField, fieldName)
{
    var strField = new String(objField.value);
    if (isWhitespace(strField)) {
        alert("Please enter a valid value for " + fieldName);
        return false;
    }

    return true;
}

function ForceEntry(objField)
{
    var strField = new String(objField.value);
    if (isWhitespace(strField)) {
        return false;
    }
    return true;
}


function locationsCheck(fromLocation, toLocation)
{
    if (fromLocation == toLocation) {
        alert("Please select different locations for From Location and To Location");
        return false;
    }
    return true;
}

/****************************************************************/

// Returns true if the string passed in is a valid number
//  (no alpha characters), else it displays an error message

function ForceNumber(objField, FieldName)
{
    var strField = new String(objField.value);

    if (isWhitespace(strField)) return true;

    var i = 0;

    for (i = 0; i < strField.length; i++)
        if (strField.charAt(i) < '0' || strField.charAt(i) > '9') {
            alert(FieldName + " must be a valid numeric entry.  Please do not use commas or any non-numeric symbols.");
            return false;
        }

    return true;
}

/****************************************************************/

// Returns true if the string passed in is a valid money
//  (no alpha characters except a decimal place),
//   else it displays an error message

function ForceMoney(objField, FieldName)
{
    var strField = new String(objField.value);

    if (isWhitespace(strField)) return true;

    var i = 0;

    for (i = 0; i < strField.length; i++)
        if ((strField.charAt(i) < '0' || strField.charAt(i) > '9') && (strField.charAt(i) != '.')) {
            alert(FieldName + " must be a valid numeric entry.  Please do not use commas or dollar signs or any non-numeric symbols.");
            return false;
        }

    return true;
}


/****************************************************************/

// Right trims the string...  Useful for SQL datatypes of CHAR

function RTrim(strTrim)
{
    var str = new String(strTrim);
    var i = 0;
    var c = "";
    var endpos = 0

    for (i = str.length; i >= 0 && endpos == 0; i = i - 1) {
        c = str.charAt(i);
        if (whitespace.indexOf(c) == -1)
            endpos = i;
    }

    return str.substring(0, endpos + 1);
}

/****************************************************************/

/* PURPOSE:  Returns true if the string is a valid date number.
	A method is passed in (1 = month, 2 = day).  If the string is
	nonnumeric, false is passed back.  If the day in the date string
	is greater than 31, false is returned.  If the month is greater
	than 12, an error is returned.
*/

function isDateNumber(strNum, method)
{
    var str = new String(strNum);
    var i = 0;

    if (isNaN(parseInt(str)) || parseInt(str) < 0) return false;

    if (method == 2)
        if (parseInt(str) > 31)
            return false;
    if (method == 1)
        if (parseInt(str) > 12)
            return false;

    for (i = 0; i < str.length; i++)
        if (str.charAt(i) < '0' || str.charAt(i) > '9')
            return false;


    return true;
}

/****************************************************************/

// Displays an alert box with the passed in string...

function PromptErrorMsg(Field, strError)
{
    alert(strError + " is invalid. Please make sure it is in dd/mm/yyyy format.");
}

/****************************************************************/

/* PURPOSE: Checks to see if the string is a valid date.  A valid
	date is defined as any of the following:

		MM/DD/YY, MM/DD/YYYY, M/D/YY, M/D/YYYY,
		MM-DD-YY, MM-DD-YYYY, M-D-YY, M-D-YYYY
*/

function ForceDate(strDate, strField)
{
    var str = new String(strDate.value);

    if (isWhitespace(str)) {
        return true;
        // if the field is empty, just return true...
    }

    var i = 0, count = str.length, j = 0;
    while ((str.charAt(i) != "/") && i < count)
        i++;

    if (i == count || i > 2) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    var addOne = false;
    if (i == 2) addOne = true;

    if (!isDateNumber(str.substring(0, i), 2)) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    j = i + 1;
    i = 0;

    while ((str.charAt(i + j) != "/") && i + j < count)
        i++;

    if (i + j == count || i > 2) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    if (!isDateNumber(str.substring(j, i + j), 1)) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    j = i + 3;
    i = 0;

    if (addOne) j++;

    while (i + j < count)
        i++;


    if (i != 2 && i != 4) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    if (!isDateNumber(str.substring(j, i + j), 3)) {
        PromptErrorMsg(strDate, strField);
        return false;
    }

    return true;
}

/****************************************************************/

// This function determines if the string passed in is a valid
// US zip code.  It accepts either ##### or #####-####.  If the
// string is valid, it returns true, else false.

function isZipcode(strZip)
{
    var s = new String(strZip);

    if (s.length != 5 && s.length != 10)
    // inappropriate length
        return false;


    for (var i = 0; i < s.length; i++)
        if ((s.charAt(i) < '0' || s.charAt(s) > '9') && s.charAt(i) != '-')
            return false;

    return true;
}

/****************************************************************/

// This function ensures that a field is less than or equal to the
// Length passed in.  You must call this function with the element
// name in your form (for example: "ForceLength(document.forms[0].txtElement)"
// as opposed to "ForceLength(document.forms[0].tx  tElement.value)"
// If the field's value is too large, an error message is displayed
// and false is returned, else true is returned.

function ForceLength(objField, nLength, strWarning)
{
    var strField = new String(objField.value);

    if (strField.length > nLength) {
        alert(strWarning);
        return false;
    } else
        return true;
}


function ismaxlength(obj) {
    var mlength = obj.getAttribute ? parseInt(obj.getAttribute("maxlength")) : ""
    if (obj.getAttribute && obj.value.length > mlength)
        obj.value = obj.value.substring(0, mlength)
}

function toggleImage(id, path, toggleCode, extension) {
    var imageSource = document.getElementById(id).src;
    if (imageSource.indexOf(toggleCode) != -1)
        document.getElementById(id).src = path + id + "." + extension;
    else
        document.getElementById(id).src = path + id + toggleCode + "." + extension;
    return false;
}

function isEmailWithoutDomain(s) {
    if (isEmpty(s))  return false;
    if (isWhitespace(s)) return false;
    return s.indexOf("@") == -1;
}