/*
-------------------------------------------------------------------------
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/
-------------------------------------------------------------------------
*/
function Validator(frmname)
{
	this.formobj=document.forms[frmname];
	if(!this.formobj)
	{
		alert("BUG: couldnot get Form object "+frmname);
		return;
	}
	if(this.formobj.onsubmit)
	{
		this.formobj.old_onsubmit = this.formobj.onsubmit;
		this.formobj.onsubmit=null;
	}
	else
	{
		this.formobj.old_onsubmit = null;
	}
	this.formobj.onsubmit=form_submit_handler;
	this.addValidation = add_validation;
	this.setAddnlValidationFunction=set_addnl_vfunction;
	this.clearAllValidations = clear_all_validations;
}
function set_addnl_vfunction(functionname)
{
	this.formobj.addnlvalidation = functionname;
}
function clear_all_validations()
{
	for(var itr=0;itr < this.formobj.elements.length;itr++)
	{
		this.formobj.elements[itr].validationset = null;
	}
}
function form_submit_handler()
{
	for(var itr=0;itr < this.elements.length;itr++)
	{
		if(this.elements[itr].validationset &&
		!this.elements[itr].validationset.validate())
		{
			return false;
		}
	}
	if(this.addnlvalidation)
	{
		str =" var ret = "+this.addnlvalidation+"()";
		eval(str);
		if(!ret) return ret;
	}
	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);
}
function ValidationDesc(inputitem,desc,error)
{
	this.desc=desc;
	this.error=error;
	this.itemobj = inputitem;
	this.validate=vdesc_validate;
}
function vdesc_validate()
{
	if(!V2validateData(this.desc,this.itemobj,this.error))
	{
		this.itemobj.focus();
		return false;
	}
	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 true;
	}
	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
				alert(strError);
				return false;
			}//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
				alert(strError + "\n[Current length = " + objValue.value.length + " ]");
				return false;
			}//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
				alert(strError + "\n[Current length = " + objValue.value.length + " ]");
				return false;
			}//if
			break;
		}//case minlen
		case "alnum2":
		{
			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
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}//if
			break;
		}//case alphanumeric
		case "alnum3": 
		{
            var charpos = objValue.value.search("[^A-Za-z0-9\\s-]");
            if(objValue.value.length > 0 &&  charpos >= 0)
            {
                if(!strError || strError.length ==0)
                {
                    strError = objValue.name+": Only alpha-numeric characters allowed ";
                }//if
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
                return false;
            }//if
            break;
        }//case alphanumeric
		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
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}//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
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}//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
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}//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
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}//if
			break;
		}
		case "email":
		{
			if(!validateEmailv2(objValue.value))
			{
				if(!strError || strError.length ==0)
				{
					strError = objValue.name+": Enter a valid Email address ";
				}//if
				alert(strError);
				return false;
			}//if
			break;
		}//case email
		case "lt":
		case "lessthan":
		{
			if(isNaN(objValue.value))
			{
				alert(objValue.name+": Should be a number ");
				return false;
			}//if
			if(eval(objValue.value) >=  eval(cmdvalue))
			{
				if(!strError || strError.length ==0)
				{
					strError = objValue.name + " : value should be less than "+ cmdvalue;
				}//if
				alert(strError);
				return false;
			}//if
			break;
		}//case lessthan
		case "gt":
		case "greaterthan":
		{
			if(isNaN(objValue.value))
			{
				alert(objValue.name+": Should be a number ");
				return false;
			}//if
			if(eval(objValue.value) <=  eval(cmdvalue))
			{
				if(!strError || strError.length ==0)
				{
					strError = objValue.name + " : value should be greater than "+ cmdvalue;
				}//if
				alert(strError);
				return false;
			}//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
					alert(strError);
					return false;
				}//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
				alert(strError);
				return false;
			}
			break;
		}//case dontselect
	}//switch
	return true;
}
/*
Copyright 2003 JavaScript-coder.com. All rights reserved.
*/