/*
  ------------------------------------------------------------------------------------------
	                    JavaScript Form Validator Version 2.0.2
	
	******************************************************************************************                    
                      Extended By : Rey Joaquino
                             Date : August 09, 2005
                             
		Extentions Made:
		================
		
		1.	Date	-	addValidation will now accept "date" as one of its Validation Descriptor 		                             
								Courtesy of SmartWebby.com and Rey Joaquino.
		2.	Color	-	Table row can have alternating colors.
								Courtesy of OpenSource Community and Rey Joaquino.										
		3.	Money	-	Monetary Fields are dynamically validated to accept only numbers. 
								Courtesy of V.V.Perumal Babu Date:Feb 18 2005 and Rey Joaquino.
		
	******************************************************************************************                            
	                                                                   
	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

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	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.
	
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    -------------------------------------------------------------------------  
		Each field in the form can have 0, 1, or more validations. 
		For example, the input should not be empty, should be less than 25 chars, 
		should be alpha-numeric, etc 

		You can associate a set of validation descriptors for each input field in the form. 
		Using The Script

		1.Include gen_validatorv2.js in your html file just before closing the HEAD tag
		
		<script language="JavaScript" src="gen_validatorv2.js" type="text/javascript"></script>
		</head>
		
		2. Just after defining your form, Create a form validator object passing the name of the form
		
		 <FORM name='myform' action="">
		 <!----Your input fields go here -->
		 </FORM>
		 <SCRIPT language="JavaScript">
		 var frmvalidator  = new Validator("myform");
		.... 
		
		3. Now add the validations required
		
		frmvalidator.addValidation("FirstName","alpha"); 
		
		the first argument is the name of the field and the second argument is the validation descriptor,
		which specifies the type of validation to be performed. You can add any number of validations.
		The list of validation descriptors are provided at the end of the documentation.
		The optional third argument is the error string to be displayed if the validation fails.
    

		<script language="JavaScript" type="text/javascript">
	 		var frmvalidator = new Validator("myform");
	 		frmvalidator.addValidation("FirstName","req","Please enter your First Name");
	 		frmvalidator.addValidation("FirstName","maxlen=20","Max length for FirstName is 20");
	 		frmvalidator.addValidation("FirstName","alpha");
	 	</script>	
 
    
	frmvalidator.addValidation("FieldName","Validation Descriptors","Error Message");    
	
	Validation Descriptors             Description 
	===========================     ====================================================================================================================================================
	required or req              -  The field should not be empty  
	maxlen=??? or maxlength=???  -  Checks the length entered data to the maximum. For example, if the maximum 
																	size permitted is 25, give the validation descriptor as "maxlen=25"  
	minlen=??? or minlength=???  -  Checks the length of the entered string to the required minimum. example "minlen=5"  
	alphanumeric or alnum        -  Check the data if it contains any other characters other than alphabetic 
																	or numeric characters  
	num or numeric               -  Check numeric data  
	alpha or alphabetic          -  Check alphabetic data.  
	email                        -  The field is an email field and verify the validity of the data.  
	lt=??? or lessthan=???       -  Verify the data to be less than the value passed. Valid only for numeric fields. 
																	example: if the value should be less than 1000 give validation description as "lt=1000"  
	gt=??? or greaterthan=???    -  Verify the data to be greater than the value passed. Valid only for numeric fields. 
																	example: if the value should be greater than 10 give validation description as "gt=10"  
	regexp=???  							   -  Check with a regular expression the value should match the regular expression.
																	example: "regexp=^[A-Za-z]{1,20}$" allow up to 20 alphabetic characters.  
	dontselect=??                -  This validation descriptor is valid only for select input items (lists) Normally,
																	the select list boxes will have one item saying 'Select One' or some thing like that.
																	The user should select an option other than this option. 
																	If the index of this option is 0, the validation description should be "dontselect=0"  
	date                         -  Validates the date in a given format. Added by Rey Joaquino August 9, 2005
	
	
	Adding Custom Validation
	========================
		If you want to add a custom validation, which is not provided by the validation descriptors,
		you can do so. Here are the steps: 
		
		Create a javascript function which returns true or false depending on the validation.
			function DoCustomValidation()
			{
			  var frm = document.forms["myform"];
			  if(frm.pwd1.value != frm.pwd2.value)
			  {
			    alert('The Password and verified password don not match!');
			    return false;
			  }
			  else
			  {
			    return true;
			  }
			}


		Associate the validation function with the validator object.
		
			frmvalidator.setAddnlValidationFunction("DoCustomValidation"); 

		The custom validation function will be called automatically after other validations. 

		If you want to do more than one custom validations, you can do all those validations in the same function. 

		function DoCustomValidation()
		{
		  var frm = document.forms["myform"];
		  if(false == DoMyValidationOne())
		  {
		    alert('Validation One Failed!');
		    return false;
		  }
		  else
		  if(false == DoMyValidationTwo())
		  {
		    alert('Validation Two Failed!');
		    return false;
		  }
		  else
		  {
		    return true;
		  }
		}
		
		where DoMyValidationOne() and DoMyValidationTwo() are custom functions for validation. 
		
	Clear All Validations
	=====================
		In some dynamically programmed pages, it may be required to change the validations
		in the form at run time. For such cases, a function is included which clears all
		validations in the validator object.
		
		frmvalidator.clearAllValidations(); 
		
		this function call clears all validations you set.
		You will not need this method in most cases. 
    
*/

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)
	{
	  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)
{
// 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 + " : 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 "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                             
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 			
			break;
			}
        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("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                                                               
              alert(strError); 
              return false;                                   
             } 
             break; 
         }//case dontselect 
    }//switch 
    return true; 
}