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.length && isNaN(itemobj.selectedIndex) )
    //for radio button; don't do for 'select' item
{
itemobj = itemobj[0];
}
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(!validateInput(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;
}
/*  checks the validity of an email address entered
*   returns true or false
*/
function validateEmail(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;
      }// if
      return true;
    }
return false;
}

function TestComparison(objValue,strCompareElement,strvalidator,strError)
{
   var bRet=true;
   var objCompare=null;
   if(!objValue.form)
   {
      alert("BUG: No Form object!");
  return false
   }
   objCompare = objValue.form.elements[strCompareElement];
   if(!objCompare)
   {
     alert("BUG: Element with name"+strCompareElement+" not found !");
     return false;
   }
   if(strvalidator != "eqelmnt" &&
     strvalidator != "neelmnt")
   {
      if(isNaN(objValue.value))
      {
        alert(objValue.name+": Should be a number ");
        return false;
      }//if
      if(isNaN(objCompare.value))
      {
        alert(objCompare.name+": Should be a number ");
        return false;
      }//if
   }//if
   var cmpstr="";
   switch(strvalidator)
   {
       case "eqelmnt":
{
   if(objValue.value != objCompare.value)
   {
        cmpstr = " should be equal to ";
      bRet = false;
   }//if
   break;
}//case
case "ltelmnt":
{
if(eval(objValue.value) >= eval(objCompare.value))
{
       cmpstr =  " should be less than ";
       bRet = false;
}
  break;
}//case
case "leelmnt":
{
if(eval(objValue.value) >  eval(objCompare.value))
{
       cmpstr =  " should be less than or equal to";
       bRet = false;
}
  break;
}//case
case "gtelmnt":
{
if(eval(objValue.value) <=  eval(objCompare.value))
{
       cmpstr =  " should be greater than";
       bRet = false;
}
  break;
}//case
case "geelmnt":
{
if(eval(objValue.value) < eval(objCompare.value))
{
       cmpstr =  " should be greater than or equal to";
       bRet = false;
}
  break;
}//case
case "neelmnt":
{
   if(objValue.value.length > 0 &&
     objCompare.value.length > 0 &&
     objValue.value == objCompare.value)
   {
        cmpstr = " should be different from ";
      bRet = false;
   }//if
   break;
}
   }//switch
   if(bRet==false)
   {
      if(!strError || strError.length==0)
  {
    strError = objValue.name + cmpstr + objCompare.value;
  }//if
  alert(strError);
   }//if
   return bRet;
}
function TestSelMin(objValue,strMinSel,strError)
{
    var bret = true;
var objcheck = objValue.form.elements[objValue.name];
var chkcount =0;
if(objcheck.length)
{
for(var c=0;c < objcheck.length;c++)
{
   if(objcheck[c].checked == "1")
   {
     chkcount++;
   }//if
}//for
}
else
{
  chkcount = (objcheck.checked == "1")?1:0;
}
var minsel = eval(strMinSel);
if(chkcount < minsel)
{
if(!strError || strError.length ==0)
{
strError = "Please Select atleast"+minsel+" check boxes for"+objValue.name;
}//if
alert(strError);
bret = false;
}
return bret;
}

function TestDontSelectChk(objValue,chkValue,strError)
{
    var pass=true;
var objcheck = objValue.form.elements[objValue.name];
    if(objcheck.length)
{
var idxchk=-1;
for(var c=0;c < objcheck.length;c++)
{
   if(objcheck[c].value == chkValue)
   {
     idxchk=c;
 break;
   }//if
}//for
if(idxchk>= 0)
{
  if(objcheck[idxchk].checked=="1")
  {
    pass=false;
  }
}//if
}
else
{
if(objValue.checked == "1")
{
pass=false;
}//if
}//else
if(pass==false)
{
     if(!strError || strError.length ==0)
        {
        strError = "Can't Proceed as you selected "+objValue.name;
        }//if
  alert(strError);

}
    return pass;
}

function TestRequiredInput(objValue,strError)
{
 var ret = true;
    if(eval(objValue.value.length) == 0)
    {
       if(!strError || strError.length ==0)
       {
         strError = objValue.name + " : Required Field";
       }//if
       alert(strError);
       ret=false;
    }//if
return ret;
}

function TestMaxLen(objValue,strMaxLen,strError)
{
 var ret = true;
    if(eval(objValue.value.length) > eval(strMaxLen))
    {
      if(!strError || strError.length ==0)
      {
        strError = objValue.name + " : "+ strMaxLen +" characters maximum ";
      }//if
      alert(strError + "\n[Current length = " + objValue.value.length + " ]");
      ret = false;
    }//if
return ret;
}

function TestMinLen(objValue,strMinLen,strError)
{
 var ret = true;
    if(eval(objValue.value.length) <  eval(strMinLen))
    {
      if(!strError || strError.length ==0)
      {
        strError = objValue.name + " : " + strMinLen + " characters minimum  ";
      }//if
      alert(strError + "\n[Current length = " + objValue.value.length + " ]");
      ret = false;
    }//if
return ret;
}

function TestInputType(objValue,strRegExp,strError,strDefaultError)
{
   var ret = true;

    var charpos = objValue.value.search(strRegExp);
    if(objValue.value.length > 0 &&  charpos >= 0)
    {
     if(!strError || strError.length ==0)
      {
        strError = strDefaultError;
      }//if
      alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
      ret = false;
    }//if
 return ret;
}

function TestEmail(objValue,strError)
{
var ret = true;
     if(objValue.value.length > 0 && !validateEmail(objValue.value) )
     {
       if(!strError || strError.length ==0)
       {
          strError = objValue.name+": Enter a valid Email address ";
       }//if
       alert(strError);
       ret = false;
     }//if
return ret;
}

function TestLessThan(objValue,strLessThan,strError)
{
var ret = true;
  if(isNaN(objValue.value))
  {
    alert(objValue.name+": Should be a number ");
    ret = false;
  }//if
  else
  if(eval(objValue.value) >=  eval(strLessThan))
  {
    if(!strError || strError.length ==0)
    {
      strError = objValue.name + " : value should be less than "+ strLessThan;
    }//if
    alert(strError);
    ret = false;
   }//if
return ret;
}

function TestGreaterThan(objValue,strGreaterThan,strError)
{
var ret = true;
     if(isNaN(objValue.value))
     {
       alert(objValue.name+": Should be a number ");
       ret = false;
     }//if
 else
     if(eval(objValue.value) <=  eval(strGreaterThan))
      {
        if(!strError || strError.length ==0)
        {
          strError = objValue.name + " : value should be greater than "+ strGreaterThan;
        }//if
        alert(strError);
        ret = false;
      }//if
return ret;
}

function TestRegExp(objValue,strRegExp,strError)
{
var ret = true;
    if( objValue.value.length > 0 &&
        !objValue.value.match(strRegExp) )
    {
      if(!strError || strError.length ==0)
      {
        strError = objValue.name+": Invalid characters found ";
      }//if
      alert(strError);
      ret = false;
    }//if
return ret;
}
function TestDontSelect(objValue,index,strError)
{
var ret = true;
     if(objValue.selectedIndex == null)
     {
       alert("BUG: dontselect command for non-select Item");
       ret = false;
     }
 else
     if(objValue.selectedIndex == eval(index))
     {
      if(!strError || strError.length ==0)
       {
       strError = objValue.name+": Please Select one option ";
       }//if
       alert(strError);
       ret =  false;
      }
return ret;
}

function TestSelectOneRadio(objValue,strError)
{
var objradio = objValue.form.elements[objValue.name];
var one_selected=false;
for(var r=0;r < objradio.length;r++)
{
  if(objradio[r].checked == "1")
  {
  one_selected=true;
break;
  }
}
if(false == one_selected)
{
      if(!strError || strError.length ==0)
       {
    strError = "Please select one option from "+objValue.name;
   }
  alert(strError);
}
return one_selected;
}

//*  Checks each field in a form
function validateInput(strValidateStr,objValue,strError)
{
    var ret = true;
    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":
         {
   ret = TestRequiredInput(objValue,strError)
           break;
         }
        case "maxlength":
        case "maxlen":
          {
 ret = TestMaxLen(objValue,cmdvalue,strError)
             break;
          }
        case "minlength":
        case "minlen":
           {
 ret = TestMinLen(objValue,cmdvalue,strError)
             break;
           }
        case "alnum":
        case "alphanumeric":
           {
ret = TestInputType(objValue,"[^A-Za-z0-9]",strError,
objValue.name+": Only alpha-numeric characters allowed ");
break;
           }
        case "alnum_s":
        case "alphanumeric_space":
           {
ret = TestInputType(objValue,"[^A-Za-z0-9\\s]",strError,
objValue.name+": Only alpha-numeric characters and space allowed ");
break;
           }
        case "num":
        case "numeric":
           {
                ret = TestInputType(objValue,"[^0-9]",strError,
objValue.name+": Only digits allowed ");
                break;
           }
        case "alphabetic":
        case "alpha":
           {
                ret = TestInputType(objValue,"[^A-Za-z]",strError,
objValue.name+": Only alphabetic characters allowed ");
                break;
           }
        case "alphabetic_space":
        case "alpha_s":
           {
                ret = TestInputType(objValue,"[^A-Za-z\\s]",strError,
objValue.name+": Only alphabetic characters and space allowed ");
                break;
           }
        case "email":
          {
   ret = TestEmail(objValue,strError);
               break;
          }
        case "lt":
        case "lessthan":
         {
          ret = TestLessThan(objValue,cmdvalue,strError);
              break;
         }
        case "gt":
        case "greaterthan":
         {
ret = TestGreaterThan(objValue,cmdvalue,strError);
            break;
         }
        case "regexp":
         {
ret = TestRegExp(objValue,cmdvalue,strError);
           break;
         }
        case "dontselect":
         {
 ret = TestDontSelect(objValue,cmdvalue,strError)
             break;
         }
case "dontselectchk":
{
ret = TestDontSelectChk(objValue,cmdvalue,strError)
break;
}
case "selmin":
{
ret = TestSelMin(objValue,cmdvalue,strError);
break;
}
case "selone":
{
ret = TestSelectOneRadio(objValue,strError);
    break;
}
//Comparisons
case "eqelmnt":
case "ltelmnt":
case "leelmnt":
case "gtelmnt":
case "geelmnt":
case "neelmnt":
{
    return TestComparison(objValue,cmdvalue,command,strError);
    break;
}
    }//switch
    return ret;
}


// color

var flashcolor="blue"
var flashinterval=1000 //flash interval in miliseconds (1000=1 sec)

var formcollect=document.getElementsByTagName? document.getElementsByTagName("FORM") : document.all? document.all.tags("FORM") : new Array()
var flashcollect=new Array()

for (i=0; i<formcollect.length; i++){
for (e=0; e<formcollect[i].elements.length; e++){
if (formcollect[i].elements[e].className=="ft")
flashcollect[flashcollect.length]=formcollect[i].elements[e]
}
}

function flashelements(){
for (f=0; f<flashcollect.length; f++){
if (flashcollect[f].style.color=='')
flashcollect[f].style.color=flashcolor
else
flashcollect[f].style.color=""
}
}

if (flashcollect.length>0)
setInterval("flashelements()",flashinterval)