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}
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){
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}
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"}
alert(strError)
return false}
break}
case "maxlength":
case "maxlen":{
if(eval(objValue.value.length)>eval(cmdvalue)){
if(!strError || strError.length==0){
strError=objValue.name+" : "+cmdvalue+" characters maximum "}
alert(strError+"\n[Current length = "+objValue.value.length+" ]")
return false}
break}
case "minlength":
case "minlen":{
if(eval(objValue.value.length)<eval(cmdvalue)){
if(!strError || strError.length==0){
strError=objValue.name+" : "+cmdvalue+" characters minimum  "}
alert(strError+"\n[Current length = "+objValue.value.length+" ]")
return false}
break}
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 "}
alert(strError+"\n [Error character position "+eval(charpos+1)+"]")
return false}
break}
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 "}
alert(strError+"\n [Error character position "+eval(charpos+1)+"]")
return false}
break}
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 "}
alert(strError+"\n [Error character position "+eval(charpos+1)+"]")
return false}
break}
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 _"}
alert(strError+"\n [Error character position "+eval(charpos+1)+"]")
return false}
break}
case "email":{
if(!validateEmailv2(objValue.value)){
if(!strError || strError.length==0){
strError=objValue.name+": Enter a valid Email address "}
alert(strError)
return false}
break}
case "lt":
case "lessthan":{
if(isNaN(objValue.value)){
alert(objValue.name+": Should be a number ")
return false}
if(eval(objValue.value)>=eval(cmdvalue)){
if(!strError || strError.length==0){
strError=objValue.name+" : value should be less than "+cmdvalue}
alert(strError)
return false}
break}
case "gt":
case "greaterthan":{
if(isNaN(objValue.value)){
alert(objValue.name+": Should be a number ")
return false}
if(eval(objValue.value)<=eval(cmdvalue)){
if(!strError || strError.length==0){
strError=objValue.name+" : value should be greater than "+cmdvalue}
alert(strError)
return false}
break}
case "regexp":{
if(!objValue.value.match(cmdvalue)){
if(!strError || strError.length==0){
strError=objValue.name+": Invalid characters found "}
alert(strError)
return false}
break}
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 "}
alert(strError)
return false}
break}}
return true}