function Validator(frmname)
{
    this.formobj=document.forms[frmname];
    if (!this.formobj.radios){
        this.formobj.radios = new Array();
    }
	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.elements_check = new Array();

	this.formobj.onsubmit = form_submit_handler;
	this.addValidation = add_validation;
	this.clearAllValidations = clear_all_validations;
}

function clear_all_validations()
{
	for(var itr=0;itr < this.formobj.elements.length;itr++)
	{
		this.formobj.elements[itr].validationset = null;
        if(this.formobj.elements[itr].type == 'radio'){
            this.formobj[this.formobj.elements[itr].name].validationset = null;
        }
	}
}

function form_submit_handler()
{
    var check = new Array();
    var elements_temp = new Array();
    for(var i = 0; i < this.elements.length; i++){
        if ( this.elements[i].type == 'radio' ){
            if (!check[this.elements[i].name]){
                if (this.radios[this.elements[i].name]) {
                    elements_temp[elements_temp.length] = this.radios[this.elements[i].name];
                } else {
                    elements_temp[elements_temp.length] = this[this.elements[i].name];
                }
                check[this.elements[i].name] = true;
            }
        } else {
            elements_temp[elements_temp.length] = this.elements[i];
        }
    }

    valError = '';
	for(var itr=0; itr < elements_temp.length; itr++)
	{
        if(elements_temp[itr].validationset){
            tempError = elements_temp[itr].validationset.validate();
            if (tempError.length > 0){
                valError = valError + "<br />" + tempError;
            }
        }
    }

    if ( valError.length > 0){
        valError = "<b>Helaas is er iets niet goed gegaan. Vriendelijk verzoeken wij u de volgende velden na te gaan.</b><br />" + valError;
        dialog(valError);
        return false;
    }
	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);

    if (itemobj.length){
        this.formobj.radios[itemname] = itemobj;
    }
}

function ValidationDesc(inputitem, desc, error)
{
    this.desc = desc;
	this.error = error;
	this.itemobj = inputitem;
	this.validate = vdesc_validate;
}

function vdesc_validate()
{
    return V2validateData(this.desc,this.itemobj,this.error);
}

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()
{
    var error = "";
    var y = 0;
    for(var itr=0;itr<this.vSet.length;itr++)
	{
        var error_temp = this.vSet[itr].validate();
        if(error_temp != true){
            if (y != 0){
                error += "<br />";
            }
            error += error_temp;
            y++;
        }
	}
    return error;
}

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(objValue.length > 0)
            {
                var check = 0;
                for(var i = 0; i < objValue.length; i++)
                {
                    if (objValue[i].checked){
                        check = 1;
                    }
                }
                if (check == 0){
                    return strError;
                }
            } else if (objValue.type == 'checkbox')
            {
                if(!objValue.checked){
                    return strError;
                }
            
            } else if(eval(objValue.value.length) == 0) 
            { 
                if(!strError || strError.length ==0) 
                { 
                    strError = objValue.name + " : Required Field"; 
                }//if 
                return strError;
            }//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 
               return strError + "\n[Current length = " + objValue.value.length + " ]";
             }//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               
               return strError + "\n[Current length = " + objValue.value.length + " ]";                  
             }//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
                //return strError + "\n [Error character position " + eval(charpos+1)+"]";
                return strError;
              }//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               
                //return strError + "\n [Error character position " + eval(charpos+1)+"]";
                return strError;
              }//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                             
                return strError + "\n [Error character position " + eval(charpos+1)+"]"; 
              }//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                             
                return strError + "\n [Error character position " + eval(charpos+1)+"]";
              }//if 			
			break;
			}
        case "email": 
          { 
               if(!validateEmailv2(objValue.value)) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name+": Enter a valid Email address "; 
                 }//if                                               
                 return strError;
               }//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               
              return strError;               
             }//if             
            break; 
         }//case lessthan 
        case "gt": 
        case "greaterthan": 
         { 
            if(isNaN(objValue.value)) 
            { 
              return objValue.name+": Should be a number ";
            }//if 
             if(eval(objValue.value) <=  eval(cmdvalue)) 
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : value should be greater than "+ cmdvalue; 
               }//if               
               return strError;               
             }//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                                                               
	              return strError;                 
	            }//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                                                               
              return strError;                                 
             } 
             break; 
         }//case dontselect 
    }//switch 
    return true; 
}
/*
	Copyright 2003 JavaScript-coder.com. All rights reserved.
*/