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)
{   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 "lowalnumhyphen":
           {  var charpos = objValue.value.search("[^a-z0-9\-_]"); 
              if(objValue.value.length > 0 &&  charpos >= 0) 
              {   if(!strError || strError.length ==0) 
                { strError = objValue.name+": characters allowed are a-z,0-9,- and _"; 
                }//if                             
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; setFocus(); 
              }//if 			
		break;
           }//lowalnumhyphen 
        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; 
}
/*
	Copyright 2003 JavaScript-coder.com. All rights reserved.
*/