/*
  -------------------------------------------------------------------------
	                    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);
					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);
					return false;
				}//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
					alert(strError);
					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);
					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);
					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);
					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.
*/