//**************************JAVASCRIPT FORM VALIDATION MODULE**************************//
// This module can be used for basic client side form validations in JavaScript.
// 
// Date Created: 25 February 2003
// Last Update: 3 March 2003
// Tested for: Netscape 6.1 and Internet Explorer 5.5 and above
// Author: Benjé Mouton
// Company: 001 Digital Construction
// Files: "validation.asp"
//
//********************************STANDARD SCRIPT BLOCK********************************//
// Include the following script block in the head tag in order for the functions to
// work.
//
// <script language=javascript>
// <!--
// 	function validate(sForm) {
// 		ErrorMsg = "";
//
// 		||<<OOoo Call Functions Here ooOO>>||
//
// 		if (ErrorMsg != "") {
// 			ErrorMsg = "The form could not be submitted for the following reasons:" + ErrorMsg;
// 			window.alert(ErrorMsg);
// 			return false;
// 		}
// 	}
// //-->
// </script>
// <script language="javascript" src="validation.asp"></script>
//
//************************************EVENT HANDLER************************************//
// Include the following event handler to activate the form validation functions.
//
// onSubmit/onClick="return(validate(this.form.name))"
//
//*************************************************************************************//
// This module contains the following functions:										
//		non_blank(form's name, field's name, error message);							* Validates for blank fields
//		is_equal(form's name, first field's name, second field's name, error message);	* Checks if given fields are equal
//		valid_email(form's name, field's name, error message);							* Validates an email address
//		credit_card(form's name, field's name, sMsg);									* Validates credit card numbers
//		format_currency(form's name, field's name, error message);						* Checks and formats to a currency, returns 2 decimals
//		check_checked(form's name, field's name, minimum selection, error message);		* Checks if checkboxes are checked
//		check_selected(form's name, field's name, minimum selection, error message);	* Checks if multiple selections are made
//		option_selected(form's name, field's name, minimum selection, error message);	* Checks if radio buttons are selected
//		is_integer(form's name, field's name, error message);							* Validates integer values
//		is_float(form's name, field's name, error message);								* Validates floating point values
//		decimal(value, decimal places);													* Returns a formatted decimal value
//		
// <script language="javascript">

//***********************************BASIC FUNCTIONS***********************************//
var ErrorMsg = "";
var Elements = new Array();

function non_blank(sForm, sField, sMsg) {												// SYNTAX: non_blank(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);

	if (trim_string(objControl.value).length < 1) {
		if (sMsg == "") {
			return false;
		} else {
			ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
		}

	} else {
		return true;
	}
}

function is_equal(sForm, sField1, sField2, sMsg, bRequired) {							// SYNTAX: is_equal(form's name, first field's name, second field's name, error message);
	var objControl1 = eval("document." + sForm + "." + sField1);
	var objControl2 = eval("document." + sForm + "." + sField2);
	var bContents1 = non_blank(sForm, sField1, "");
	var bContents2 = non_blank(sForm, sField2, "");
	var bEqual = 0;

	if (trim_string(objControl1.value) == trim_string(objControl2.value) && bContents1 && bContents2) {
		bEqual = true;
	} else {
		bEqual = false;
	}

	if (bRequired && !bEqual) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else if (!bRequired && !bEqual) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

function valid_email(sForm, sField, sMsg, bRequired) {									// SYNTAX: valid_email(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);
	var bContents = non_blank(sForm, sField, "");
	var bCheck = 0;

	if (objControl.value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1) {
		bCheck = true;
	} else {
		bCheck = false;
	}
	
	if (bRequired && !bContents && !bCheck) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else if (bRequired && bContents && !bCheck) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else if (!bRequired && bContents && !bCheck) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

function credit_card(sForm, sField, sMsg) {												// SYNTAX: credit_card(form's name, field's name, sMsg);
	var objControl = eval("document." + sForm + "." + sField);
	var Err = false;

	if (!non_blank(sForm, sField, "")) {
		Err = true;
	}

	if (!is_integer(sForm, sField, ""))	{
		Err = true;
	}

	if (trim_string(objControl.value).length > 19) {
		Err = true;
	}
	
	if (!Err) {
		var slength = objControl.value.length;
		var value = new Array(slength);
		var sSum = 0;
		var mSum = 0;
	
		for (var i = 0; i < slength; i++) {
			value[i] = objControl.value.charAt(i);
		}
		
		value.reverse();
		
		for (var i = 0; i < slength; i++) {
			if (i % 2 != 0) {
				sSum = sSum + ("" + eval(value[i] * 2));
			} else {
				sSum = sSum + ("" + eval(value[i]));
			}
		}
		
		for (var i = 0; i < sSum.length; i++) {
			mSum = mSum + eval(sSum.charAt(i));
		}
	} else {
		Err = true;
	}
	
	if (mSum % 10 != 0 || Err) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else {
		return true;
	}
}

function format_currency(sForm, sField, sMsg, bRequired) {											// SYNTAX: format_currency(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);
	var sValue = 0;
	var Err = false;

	if (is_float(sForm, sField, "", bRequired) == true) {
		sValue = decimal(objControl.value, 2);
	} else {
		Err = true;
	}
	
	if (Err) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else {
		objControl.value = sValue;
	}
}

function check_checked(sForm, sField, iMin, sMsg) {										// SYNTAX: check_checked(form's name, field's name, minimum selection, error message);
	var elements = document.getElementsByName(sField);
	var intChecked = 0;

	for (var i = 0; i < elements.length; i++) {
		if (elements[i].checked) {
			intChecked++;
		}
	}
	
	if (intChecked < iMin) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

function check_selected(sForm, sField, iMin, sMsg) {									// SYNTAX: check_selected(form's name, field's name, minimum selection, error message);
	var objControl = eval("document." + sForm + "." + sField);
	var intSelected = 0;

	for (var i = 0; i < objControl.length; i++) {
		if (objControl[i].selected) {
			intSelected++;
		}
	}

	if (intSelected < iMin) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

function option_selected(sForm, sField, iMin, sMsg) {									// SYNTAX: option_selected(form's name, field's name, minimum selection, error message);
	var elements = document.getElementsByName(sField);
	var intChecked = 0;

	for (var i = 0; i < elements.length; i++) {
		if (elements[i].checked == true) {
			intChecked++;
		}
	}
	
	if (intChecked < iMin) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

function check_selected_value(sForm, sField, sMsg) {									// SYNTAX: check_selected_value(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);

	if (objControl.value == "") {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	}
}

//***********************************DATE FUNCTIONS************************************//

function valid_date(sForm, sField, sMsg) {												// SYNTAX: valid_date(form's name, field's name, errormessage);
	var objControl = eval("document." + sForm + "." + sField);
	var iDays = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
	var sDate = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
	var Err = false;
	
	var tDate = objControl.value.split("/");

	var day = tDate[0];
	var month = tDate[1];
	var year = tDate[2];

	if (!day || !month || !year) {
		Err = true;
	}	
	
	if (year.length != 4 && year.length != 2 && !Err) {
		Err = true;
	}	

	if (year % 4 == 0 && year % 400 == 0 && !Err) {
		iDays[1] = 29;
	}
	
	if (day > iDays[eval(month - 1)] && !Err) {
		Err = true;
	}
	
	if (Err) {
		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
	} else {
		objControl.value = day + "/" + month + "/" + year;
		return true;
	}
}

//***********************************MATHS FUNCTIONS***********************************//

function is_integer(sForm, sField, sMsg) {												// SYNTAX: is_integer(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);
	var testString = /\D/;
	
	if (testString.test(objControl.value))	{
		if (trim_string(sMsg).length < 1) {
			return false;
		} else {
			ErrorMsg = ErrorMsg + "\n  -  " + sMsg;
		}
	} else {
		return true;
	}
}

function is_float(sForm, sField, sMsg, bRequired) {												// SYNTAX: is_float(form's name, field's name, error message);
	var objControl = eval("document." + sForm + "." + sField);
	var bFloat = new Boolean(parseFloat(trim_string(objControl.value)) == trim_string(objControl.value));
      var ShowMsg = new Boolean(sMsg.length > 1);
      var bContents = new Boolean(trim_string(objControl.value).length > 1);
      
      if (bRequired == true && bFloat == false) {
      	if (ShowMsg == true) {
      		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;	
      	} else {
      		return false;
      	}
      } else if (bRequired == false && bContents == true && bFloat == false) {
      	if (ShowMsg == true) {
      		ErrorMsg = ErrorMsg + "\n  -  " + sMsg;	
      	} else {
      		return false;
      	}
      } else {
      	return true;
      }
}

function decimal(sValue, iDec) {
      if (sValue.length > 0) {														// SYNTAX: decimal(value, decimal places);
            var sTemp = Math.round(Math.pow(10, iDec) * sValue) + "";
            var sDecimal = sTemp.substring(0, sTemp.length - iDec) + "." + sTemp.substring(sTemp.length - iDec, sTemp.length);
            return sDecimal;
      } else {
            return "";
      }
}

//**********************************STRING FUNCTIONS***********************************//

function trim_string(string) {
	if (string.length != "") {
		return string.replace(/\s+/g, "");
	} else {
		return string;
	}
}

//*************************************FORM CLONE**************************************//

function form_clone_one() {																// SYNTAX: onload="form_clone_one()"
	var iElements = document.forms[0].length;

	for (var i = 0; i < iElements; i++) {
		if (document.forms[0].elements[i].type == "text") {
			Elements[i] = new Array(""+document.forms[0].elements[i].value, "");
		} else if (document.forms[0].elements[i].type == "password") {
			Elements[i] = new Array(""+document.forms[0].elements[i].value, "");
		} else if (document.forms[0].elements[i].type == "radio") {
			Elements[i] = new Array(""+document.forms[0].elements[i].checked, "");
		} else if (document.forms[0].elements[i].type == "checkbox") {
			Elements[i] = new Array(""+document.forms[0].elements[i].checked, "");
		} else if (document.forms[0].elements[i].type == "select-multiple") {
			Elements[i] = new Array(""+document.forms[0].elements[i].selectedIndex, "");
		} else if (document.forms[0].elements[i].type == "select-one") {
			Elements[i] = new Array(""+document.forms[0].elements[i].value, "");
		} else if (document.forms[0].elements[i].type == "hidden") {
			Elements[i] = new Array(""+document.forms[0].elements[i].value, "");
		} else {
			Elements[i] = new Array(""+document.forms[0].elements[i].value, "");
		}
	}
}

function form_clone_two(sForm, sField) {																// SYNTAX: onload="form_clone_two(this.form.name, output field's name)"
	var iElements = document.forms[0].length;

	for (var i = 0; i < iElements; i++) {
		if (document.forms[0].elements[i].type == "text") {
			Elements[i][1] = ""+document.forms[0].elements[i].value;
		} else if (document.forms[0].elements[i].type == "password") {
			Elements[i][1] = ""+document.forms[0].elements[i].value;
		} else if (document.forms[0].elements[i].type == "radio") {
			Elements[i][1] = ""+document.forms[0].elements[i].checked;
		} else if (document.forms[0].elements[i].type == "checkbox") {
			Elements[i][1] = ""+document.forms[0].elements[i].checked;
		} else if (document.forms[0].elements[i].type == "select-multiple") {
			Elements[i][1] = ""+document.forms[0].elements[i].selectedIndex;
		} else if (document.forms[0].elements[i].type == "select-one") {
			Elements[i][1] = ""+document.forms[0].elements[i].value;
		} else if (document.forms[0].elements[i].type == "hidden") {
			Elements[i][1] = ""+document.forms[0].elements[i].value;
		} else {
			Elements[i][1] = ""+document.forms[0].elements[i].value;
		}
	}
	compare_clones(sForm, sField);
}

function compare_clones(sForm, sField) {
	var objControl = eval("document." + sForm + "." + sField);
	var iElements = document.forms[0].length;
	var iDiscrepancies = "";

	for (var j = 0; j < iElements; j++) {
		if (trim_string(Elements[j][0]) != trim_string(Elements[j][1])) {
			iDiscrepancies++;
		}
	}
	
	if (iDiscrepancies > 0) {
		objControl.value = "True"
	} else {
		objControl.value = "False"
	}
}

//*********************************CONFIRMATION POPUP**********************************//

function click_confirm(sElement, sMsg, bEnabled) {
	
}

//***********************************ERROR MESSAGES************************************//

var Msg1 = "Field may not contain a zero length value."
var Msg2 = "Passwords may not contain a zero length value or passwords do not correspond."
var Msg3 = "Field does not contain a valid email address."
var Msg4 = "Field may not contain a zero length value or it does not contain a valid credit card number."
var Msg5 = "Field does not contain a valid currency value."
var Msg6 = "Field does not contain a valid integer value."
var Msg7 = "The amount of checkboxes checked are invalid."
var Msg8 = "The amount of options selected are invalid."
var Msg9 = "The option selected is invalid."
var Msg10 = "The date entered is invalid."

// </script>