/*
  -------------------------------------------------------------------------
	                    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: het form object is niet juist geconfigureerd");
		return;
	}//if
	var itemobj = this.formobj[itemname];
  if(!itemobj)
	{
	  alert("BUG: Kan het object "+itemname+" niet vinden");
		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 + " : Verplicht veld";
              		}//if 
              		alert(strError); 
              		return false; 
           	}//if 
           	break;             
        }//case required
        
        case "hidden":
        { 
		if(objValue.value == '') 
		{ 
              		if(!strError || strError.length ==0) { 
                		strError = objValue.name + " : Verplicht veld";
              		}//if 
              		alert(strError); 
              		return ; 
           	}//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[Huidige lengte = " + 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[Huidige lengte = " + 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+": Alleen letters en cijfers zijn toegestaan "; 
                	}//if 
                	alert(strError + "\n [Positie foutief teken " + 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+": Alleen cijfers zijn toegestaan "; 
			}//if               
                	//alert(strError + "\n [Positie foutief teken " + 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+": Alleen letters zijn toegestaan "; 
			}//if                             
			alert(strError + "\n [Positie foutief teken " + eval(charpos+1)+"]"); 
			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+": Toegestane karakters zijn: A-Z,a-z,0-9,- en _"; 
			}//if                             
                	alert(strError + "\n [Positie foutief teken " + eval(charpos+1)+"]"); 
                	return false; 
		}//if 			
		break;
	}
	
        case "email": 
	{ 
		if(!validateEmailv2(objValue.value)) 
		{ 
			if(!strError || strError.length ==0) 
			{ 
				strError = objValue.name+": Voer een geldig e-mail adres in "; 
			}//if                                               
			alert(strError); 
			return false; 
		}//if 
		break; 
	}//case email
	 
        case "lt": 
        case "lessthan": 
	{ 
		if(isNaN(objValue.value)) 
		{ 
			alert(objValue.name+": Dit hoort een nummer te zijn "); 
			return false; 
		}//if 
		if(eval(objValue.value) >=  eval(cmdvalue)) 
		{ 
			if(!strError || strError.length ==0) 
			{ 
				strError = objValue.name + " : waarde moet kleiner zijn als "+ cmdvalue; 
			}//if               
			alert(strError); 
			return false;                 
		}//if             
            	break; 
        }//case lessthan
        
        case "gt": 
        case "greaterthan": 
	{ 
		if(isNaN(objValue.value)) 
		{ 
			alert(objValue.name+": Dit hoort een nummer te zijn "); 
			return false; 
		}//if 
		if(eval(objValue.value) <=  eval(cmdvalue)) 
		{ 
			if(!strError || strError.length ==0) 
			{ 
				strError = objValue.name + " : waarde moet groter zijn als "+ 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+": Ongeldig karakter gevonden "; 
				}//if                                                               
				alert(strError); 
	              		return false;                   
	            	}//if 
		}//if
		break; 
        }//case regexp
        
        case "dontselect": 
	{ 
		if(objValue.selectedIndex == null) 
		{ 
			alert("BUG: dont select command for non-select Item"); 
			return false; 
		} 
		if(objValue.selectedIndex == eval(cmdvalue)) 
		{ 
			if(!strError || strError.length ==0) 
			{ 
				strError = objValue.name+": Selecteer minimaal 1 optie "; 
			}//if                                                               
			alert(strError); 
			return false;                                   
		} 
		break; 
	}//case dontselect
	 
    }//switch 
    return true; 
}