/*
  -------------------------------------------------------------------------
	                    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: could not 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 validateDate(strValue) {
  var objRegExp = /^\d{1,2}(\-|\/|\.)\d{1,2}\1\d{4}$/
  //check to see if in correct format
  if(!objRegExp.test(strValue))
    return false; //doesn't match pattern, bad date
  else{
    var strSeparator = strValue.substring(2,3) //find date separator
    var arrayDate = strValue.split(strSeparator); //split date into month, day, year
    //create a lookup for months not equal to Feb.
    var arrayLookup = { '01' : 31,'03' : 31, '04' : 30,'05' : 31,'06' : 30,'07' : 31,
                        '08' : 31,'09' : 30,'10' : 31,'11' : 30,'12' : 31}
    var intDay = parseInt(arrayDate[0]);

    //check if month value and day value agree
    if(arrayLookup[arrayDate[1]] != null) {
      if(intDay <= arrayLookup[arrayDate[1]] && intDay != 0)
        return true; //found in lookup table, good date
    }
    //check for February
    var intYear = parseInt(arrayDate[2]);
    var intMonth = parseInt(arrayDate[1]);
    if( ((intYear % 4 == 0 && intDay <= 29) || (intYear % 4 != 0 && intDay <=28)) && intDay !=0)
      return true; //Feb. had valid number of days
  }
  return false; //any other values, bad date
}


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 = "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 = "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 = "Enter a valid Email address"; 
                 }//if                                               
                 alert(strError); 
                 return false; 
               }//if 
           break; 
          }//case email
        case "date": {
               if(!validateDate(objValue.value)) {
                 if(!strError || strError.length ==0) {
                    strError = "Enter a valid date "; 
                 }//if
                 alert(strError);
                 return false;
               }//if
           break;
          }//case date
        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 = "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; 
}