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

 /  Validator v 1.2                       /

 /  Client Side Form Validator            /

 /                                        /

 /  Author: Emre Trker                   /

 /  Date: 23-04-2004                      /

 /                                        /

 / emre_turker@gmail.com                  /

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



// variables that keeps the validation message and validation status

var OK=true;

var MESSAGE="";



// reqular expression patterns

var NUMBER = /^[\-]?\d*$/ ;

var REAL = /^[\-]?\d*\.?\d*$/;



var TEXTONLY = /^[a-zA-Z\.\- sSiIçÇüÜöÖgGþÞðÐýI ]*$/ ;

var PASSWORD = /^\w+$/ ;

var TEXT = /^[^<^>]*$/;



var DATE = /^(\d{1,2})\-(\d{1,2})\-(\d{4})$/;

var TIME = /^(\d{1,2})\:(\d{1,2})\:(\d{1,2})$/;



var EMAIL = /^[\w-\.]+\@[\w\.-]+\.[a-z]{2,4}(\.[a-z]{2,4})*$/;

var PHONE = /^[\d\s\-]+$/;



// variables that keeps the element to be focused after error message

var focusElement;

var first=0;



// main validation function

function validate(a)

{

	// variable a refers to the form to be posted

	

	// initialize variables

	focusElement = null;

	OK=true;

	MESSAGE="";

	var i,x;

	

	/* 	set validation status to true

		if no error is found it will stay as true */

	var ok = true;

	

	// get the number of elements in the form

	i = a.elements.length;

	

	// cycle through each element in the form

	for (x=0;x<i;x++)

	{

		// get the elements that includes "mis336" tag	

		if(a.elements[x].attributes.getNamedItem('mis336'))

		{

			// set each elements style to mis336

			if (document.getElementById(a.elements[x].name + 'Lbl'))

				document.getElementById(a.elements[x].name + 'Lbl').className="mis336";

				

			// call splitVal function to split the values that mis336 tag has	

			splitVal(a.elements[x]);

		}

	}

	

	/* 	Final Operation :

		if variable OK is true then it means that validation is ok.

		if it is false it means that there are fields that is not validated. */

	if (!OK)

	{

		// Show generated message

		alert(MESSAGE);

		// focus the first element that has an error

		focusElement.focus();

		// if the element type is text select the text entered.

		if(focusElement.type=="text" || focusElement.type=="textarea" || focusElement.type=="password")

			focusElement.select();

	}

	return OK;

}



function splitVal(a)

{

	var z=0;

	// split the values in the mis336 tag by "|" character

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	

	// call appropriate function according to the first value in the mis336 tag

	switch(splits[0])

	{

		case "integer":

			return validateInteger(a);

			break;

		

		case "float":

			return validateFloat(a);

			break;

		

		case "textonly":

			return validateString(a,TEXTONLY);

			break;

			

		case "password":

			return validateString(a,PASSWORD);

			break;

			

		case "text":

			return validateString(a,TEXT);

			break;

			

		case "email":

			return validateString(a,EMAIL);

			break;

			

		case "phone":

			return validateString(a,PHONE);

			break;			

						

		case "select":

			return validateSelect(a);

			break;

			

		case "radio":

			return validateRadio(a);

			break;

			

		case "checkbox":

			return validateCheckBox(a);

			break;			

			

		case "date":

			return validateDate(a);

			break;

			

		case "time":

			return validateTime(a);

			break;		

			

		case "match":

			return validateMatch(a);

			break;				

			

		default:

			

	}

}



// the function that checks wheter two fields match or not

function validateMatch(a)

{

	// split the value in the mis336 tag and find the element to be compared with

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	controlToMatch=splits[1];



	// check wheter two fields match

	if (a.value==document.getElementById(controlToMatch).value)

		return true;

	else

		// call the function that processes the error

		return finish(a,splits);

}



// function checks the value if it is a date or not

function validateDate (a) 

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');



	// is it a required field

	if (isEmptyOk(a))

		return true;

	

	// regular expression check

	if (!DATE.test(a.value))

		return finish(a,splits)

	// check allowed ranges	for months and days

	if (RegExp.$1 > 31 || RegExp.$2 > 12)

		return finish(a,splits)

	// check number of day in month

	var dt_test = new Date(RegExp.$3, Number(RegExp.$2-1), RegExp.$1);

	if (dt_test.getMonth() != Number(RegExp.$2-1))

		return finish(a,splits);

	return true;

}



// function checks the value if it is a time or not

function validateTime(a) 

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	// check format

	if (isEmptyOk(a))

		return true;

	// regular expression check

	if (!TIME.test(a.value))

		return finish(a,splits);

	// check allowed ranges	

	if (RegExp.$1 > 23 || RegExp.$2 > 59 || RegExp.$3 > 59)

		return finish(a,splits);

	return true;

}



// function that checks wheter a value is selected or not in a combo box

function validateSelect(a)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	// if selected index is below 1, it means that there is no selected value

	if (a.selectedIndex<1)

		return finish(a,splits);

}



// checks wheter a value selected or not in a group of radio buttons

function validateRadio(a)

{

	var checked=false;

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	// get all input tags in the document

	var inputs = document.getElementsByTagName ('input');

	if (inputs) 

	{

		// cycle through all input elements

		for (var i = 0; i < inputs.length; ++i) 

		{

			// look at the matched radio elements

			if (inputs[i].type == 'radio' && inputs[i].name == a.name)

				if (inputs[i].checked)

					checked=true; 

		}

	}

	if (!checked)

		return finish(a,splits);

}



// checks wheter required values are checked or not in a group of checkboxes

function validateCheckBox(a)

{

	var checked=false;

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	if (splits.length==2) 

		return false;

		

	var groupName=splits[1];

	var atLeastChecked=splits[2];

	var currentChecked=0;

	

	// get all input tags in the document	

	var inputs = document.getElementsByTagName ('input');

	if (inputs) 

	{

		// cycle through all input elements

		for (var i = 0; i < inputs.length; ++i) 

		{

			// look at the matched checkbox elements

			if (inputs[i].type == 'checkbox')

			{

				var attrSplits=inputs[i].attributes.getNamedItem('mis336').value.split('|');

				if (attrSplits[1]==groupName && inputs[i].checked)

					// if checkbox belongs to specified group and checked increse the counter by 1

					currentChecked++;

			}

		}

	}

	// if total checked elements meets the requirement then validation result is true

	if (currentChecked>=atLeastChecked)

		checked=true;



	if (!checked)

		return finish(a,splits);

}



// makes validation of a string acoording to a regular expression pattern

function validateString(a,regX)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');



	// if the field is required and empty than return false

	if (isEmptyErr(a))

	{

		return finish(a,splits);

	}



	// if the field is not required and empty then return true

	if (isEmptyOk(a))

		return true;

	

	// call the function that checks the string values.

	if (!isStringOK(a.value,regX))

	{

		return finish(a,splits);

	}



	/* 	if third value is numeric and the number of values 

		in the mis336 tag is more than 3 

		it means that there are additional criteria to match */

	if (splits[2])

	{

		if (isNumeric(splits[2]) && splits.length>3)

		{

			// the minimum number of characters

			var minimum=splits[2];

			// maximum number of characters

			var maximum=splits[3];

			if ((a.value.length < parseInt(minimum)) || (a.value.length > parseInt(maximum)))

				return finish(a,splits);

			else

				return true;

		}

		else

			return true;

	}

	

}



// checks wheter the value is integer

function validateInteger(a)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	

	// if the field is required and empty than return false

	if (isEmptyErr(a))

	{

		return finish(a,splits);

	}

	

	// if the field is not required and empty then return true

	if (isEmptyOk(a))

		return true;

	

	// call the function that checks the number

	if (!isNumeric(a.value))

	{

		return finish(a,splits);

	}

	

	/* 	if third value is numeric and the number of values 

		in the mis336 tag is more than 3 

		it means that there are additional criteria to match */	

	if (splits[2])

	{

		if (isNumeric(splits[2]) && splits.length>3)

		{

			// minumum value that the field can take

			var minimum=splits[2];

			// maximum value that the field can take			

			var maximum=splits[3];

			if ((a.value < parseInt(minimum)) || (a.value > parseInt(maximum)))

				return finish(a,splits);

			else

				return true;

		}

		else

			return true;

	}

}



// checks wheter the the value is a floating number

function validateFloat(a)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');



	// if the field is required and empty than return false

	if (isEmptyErr(a))

	{

		return finish(a,splits);

	}

	

	// if the field is not required and empty then return true

	if (isEmptyOk(a))

		return true;

	

	// call the function that checks the floating number

	if (!isFloat(a.value))

	{

		return finish(a,splits);

	}



	/* 	if third value is numeric and the number of values 

		in the mis336 tag is more than 3 

		it means that there are additional criteria to match */	

	if (splits[2])

	{

		if (isFloat(splits[2]) && splits.length>3)

		{

			// minumum value that the field can take

			var minimum=splits[2];

			// maximum value that the field can take		

			var maximum=splits[3];

			if ((a.value < parseFloat(minimum)) || (a.value > parseFloat(maximum)))

				return finish(a,splits);

			else

				return true;

		}

		else

			return true;

	}

}



function isStringOK(sText,regX)

{

	return regTest(regX,sText);

}



function isNumeric(sText)

{

	return regTest(NUMBER,sText);

}



function isFloat(sText)

{

	return regTest(REAL,sText);

}



// function that makes regular expression tests

function regTest(regEx,strToTest)

{

	if(regEx.test(strToTest))

	{

		return true;

	}

	else

		return false

}



// if the field is not required and empty then return true

function isEmptyOk(a)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	if (splits[1]=="false" && a.value=="")

	{

		return true;

	}

}



// if the field is required and empty than return false

function isEmptyErr(a)

{

	var splits=a.attributes.getNamedItem('mis336').value.split('|');

	if (splits[1]!="false" && a.value=="")

	{

		return true;

	}

}



// process the error

function finish(a,splits)

{

	// get the error message and add to the variable message with new line character

	MESSAGE += splits[splits.length-1] + "\n";

	

	// change the value of OK variable to false means that validation result is false

	OK=false;

	

	// change the style of the label ot element that has error to mis336Error

	if (document.getElementById(a.name + 'Lbl'))

		document.getElementById(a.name + 'Lbl').className = "mis336Error";



	// if focus element variable is not set, set it

	if(!focusElement) 

		focusElement=a; 

	return false;

}