/*
  -------------------------------------------------------------------------
	                    JavaScript Form Validator 
                                Version 2.0.2
	Copyright 2003 JavaScript-coder.com. All rights reserved.
	You use this script in your Web pages, provided these opening credit
    lines are kept intact.
	The Form validation script is distributed free from JavaScript-Coder.com

	You may please add a link to JavaScript-Coder.com, 
	making it easy for others to find this script.
	Checkout the Give a link and Get a link page:
	http://www.javascript-coder.com/links/how-to-link.php

    You may not reprint or redistribute this code without permission from 
    JavaScript-Coder.com.
	
	JavaScript Coder
	It precisely codes what you imagine!
	Grab your copy here:
		http://www.javascript-coder.com/
	Patched by Sergey N. Kruk <sergey.kruk@synapse-lab.co.uk>
		[!] Changed error output from alert to ShowError.
    -------------------------------------------------------------------------  
*/
////////////////////////////////////////////////////////////////////////////////
function Validator(frm)
{
	this.formobj = frm;
	if (!this.formobj)
	{
		alert("BUG: couldnot get Form object");
		return;
	}
	this.addValidation = add_validation;
	this.setAddnlValidationFunction = set_addnl_vfunction;
	this.clearAllValidations = clear_all_validations;
	this.validate = form_validate;
}

////////////////////////////////////////////////////////////////////////////////
function set_addnl_vfunction(_function)
{
	this.formobj.addnlvalidation = _function;
	return this;
}

////////////////////////////////////////////////////////////////////////////////
function clear_all_validations()
{
	for (var itr=0; itr < this.formobj.elements.length; itr++)
	{
		this.formobj.elements[itr].validationset = null;
	}
}

////////////////////////////////////////////////////////////////////////////////
function form_validate()
{
	for (var itr = 0; itr < this.formobj.elements.length; itr++)
	{
		if (this.formobj.elements[itr].validationset)
		{
			try
			{
				this.formobj.elements[itr].validationset.validate();
			}
			catch (err)
			{
				this.formobj.showError(err.input, err.message);
				return false;
			}
		}
	}
	if (this.formobj.addnlvalidation)
	{
		try
		{
			 this.formobj.addnlvalidation.apply(this.formobj);
		}
		catch (err)
		{
			this.formobj.showError(err.input, err.message);
			return false;
		}
	}
	return true;
}

////////////////////////////////////////////////////////////////////////////////
function add_validation(itemname, descriptor, errstr)
{
	if (!this.formobj)
	{
		alert("BUG: the form object is not set properly");
		return;
	}//if
	var itemobj = this.formobj[itemname];
	if (!itemobj)
	{
		alert("BUG: Couldnot get the input object named: " + itemname);
		return;
	}
	if (!itemobj.validationset)
	{
		itemobj.validationset = new ValidationSet(itemobj);
	}
	itemobj.validationset.add(descriptor, errstr);
	return this;
}

////////////////////////////////////////////////////////////////////////////////
function ValidationDesc(inputitem, desc, error)
{
	this.desc = desc;
	this.error = error;
	this.itemobj = inputitem;
	this.validate = vdesc_validate;
}

////////////////////////////////////////////////////////////////////////////////
function vdesc_validate()
{
	try
	{
		V2validateData(this.desc, this.itemobj, this.error);
	}
	catch (err)
	{
		this.itemobj.focus();
		throw err;
	}
	return true;
}

////////////////////////////////////////////////////////////////////////////////
function ValidationSet(inputitem)
{
	this.vSet = new Array();
	this.add = add_validationdesc;
	this.validate = vset_validate;
	this.itemobj = inputitem;
}

////////////////////////////////////////////////////////////////////////////////
function add_validationdesc(desc,error)
{
	this.vSet[this.vSet.length] = new ValidationDesc(this.itemobj,desc,error);
}

////////////////////////////////////////////////////////////////////////////////
function vset_validate()
{
	for(var itr = 0; itr < this.vSet.length; itr++)
	{
		if (!this.vSet[itr].validate())
		{
			return false;
		}
	}
	return true;
}

////////////////////////////////////////////////////////////////////////////////
function validateEmailv2(email)
{
	// a very simple email validation checking.
	// you can add more complex email checking if it helps
	if (email.length <= 0)
	{
		return false;
	}
	var splitted = email.match("^(.+)@(.+)$");
	if (splitted == null) return false;
	if (splitted[1] != null)
	{
		var regexp_user=/^\"?[\w-_\.]*\"?$/;
		if (splitted[1].match(regexp_user) == null) return false;
	}
	if (splitted[2] != null)
	{
		var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
		if (splitted[2].match(regexp_domain) == null)
		{
			var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
			if (splitted[2].match(regexp_ip) == null) return false;
		}// if
		return true;
	}
	return false;
}

////////////////////////////////////////////////////////////////////////////////
function V2validateData(strValidateStr, objValue, strError)
{ 
	var epos = strValidateStr.search("=");
	var  command  = "";
	var  cmdvalue = "";
	if (epos >= 0)
	{
		command  = strValidateStr.substring(0,epos);
		cmdvalue = strValidateStr.substr(epos+1);
	}
	else
	{
		command = strValidateStr;
	}
	switch(command)
	{
		case "req":
		case "required":
		{
			if (eval(objValue.value.length) == 0)
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name + " : Required Field";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case required
		case "maxlength":
		case "maxlen":
		{
			if (eval(objValue.value.length) >  eval(cmdvalue))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name + " : "+cmdvalue+" characters maximum ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case maxlen
		case "minlength":
		case "minlen":
		{
			if (eval(objValue.value.length) <  eval(cmdvalue))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name + " : " + cmdvalue + " characters minimum  ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case minlen
		case "alnum":
		case "alphanumeric":
		{
			var charpos = objValue.value.search("[^A-Za-z0-9]");
			if (objValue.value.length > 0 &&  charpos >= 0)
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": Only alpha-numeric characters allowed ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case alphanumeric
		case "num":
		case "numeric":
		{
			var charpos = objValue.value.search("[^0-9]");
			if (objValue.value.length > 0 &&  charpos >= 0)
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": Only digits allowed ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//numeric
		case "alphabetic":
		case "alpha":
		{
			var charpos = objValue.value.search("[^A-Za-z]");
			if (objValue.value.length > 0 &&  charpos >= 0)
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": Only alphabetic characters allowed ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//alpha
		case "alnumhyphen":
		{
			var charpos = objValue.value.search("[^A-Za-z0-9\-_]");
			if (objValue.value.length > 0 &&  charpos >= 0)
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": characters allowed are A-Z,a-z,0-9,- and _";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}
		case "email":
		{
			if (!validateEmailv2(objValue.value))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": Enter a valid Email address ";
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case email
		case "lt":
		case "lessthan":
		{
			if (isNaN(objValue.value))
			{
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			if (eval(objValue.value) >=  eval(cmdvalue))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name + " : value should be less than "+ cmdvalue;
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case lessthan
		case "gt":
		case "greaterthan":
		{
			if (isNaN(objValue.value))
			{
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			if (eval(objValue.value) <=  eval(cmdvalue))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name + " : value should be greater than "+ cmdvalue;
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}//if
			break;
		}//case greaterthan
		case "regexp":
		{
			if (objValue.value.length > 0)
			{
				if (!objValue.value.match(cmdvalue))
				{
					if (!strError || strError.length ==0)
					{
						strError = objValue.name+": Invalid characters found ";
					}//if
					err = {input: objValue.name, message: strError};
					throw err;
				}//if
			}
			break;
		}//case regexp
		case "dontselect":
		{
			if (objValue.selectedIndex == null)
			{
				alert("BUG: dontselect command for non-select Item");
				return false;
			}
			if (objValue.selectedIndex == eval(cmdvalue))
			{
				if (!strError || strError.length ==0)
				{
					strError = objValue.name+": Please Select one option "; 
				}//if
				err = {input: objValue.name, message: strError};
				throw err;
			}
			break;
		}//case dontselect
	}//switch
	return true;
}