function Validator(frmname)
{
	this.formobj=document.forms[frmname];
	if(!this.formobj)
	{
		alert("MESSAGE: 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("MESSAGE: The form object is not set properly!");
		return;
	}//if
	var itemobj = this.formobj[itemname];
	if(!itemobj)
	{
		alert("MESSAGE: 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;
}//end validateEmailv2
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 "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 "alphanumhyphen":
    {
          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;
	}//alphanumhypen
	case "alphaname":
	{
	  var charpos = objValue.value.search("[^A-Za-z\-\']"); 
	      if(objValue.value.length > 0 &&  charpos >= 0) 
	       { 
	                if(!strError || strError.length ==0) 
	                { 
	                  strError = objValue.name+": characters allowed are A-Z,a-z,' and -"; 
	                }//if                             
	                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
	                return false; 
              }//if 			
	break;
	}//alphaname
    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("MESSAGE: 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 
    case "checkbox":
    {
      if (objValue.checked == false)
      {
        alert(strError);
        return false;
      }//if
      break;
    }//checkbox
    case "confirmpassword":
    {
      if (objValue.value != document.registrationForm.fldPassword.value)
      { 
        alert(strError);
        return false;
      }
      break;
    }//confirm password
    
    case "confirmemail":
    {
      if (objValue.value != document.registrationForm.fldEmail.value)
      { 
        alert(strError);
        return false;
      }
     break;
    }//confirm email
    
    }//switch 
    return true; 
}
/*
   These are java script validation functions developed by Dimitar Ivanov. 
   Some of the functions are based on code provided by JavaScript-coder.com.
   All rights reserved (c) 2005
*/