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 checkDate(strDate)
{
	if (strDate.length <= 0)
	{
		return true;	
	}
	
	var ls_temp		= strDate.substr(3, 3) + strDate.substr(0, 3) + strDate.substr(6, 4)
	var dateregex	= /^[ ]*[0]?(\d{1,2})\/(\d{1,2})\/(\d{4,})[ ]*$/;
	var match		= ls_temp.match(dateregex);
	if (match)
	{
		var tmpdate=new Date(match[3],parseInt(match[1],10)-1,match[2]);
		if (tmpdate.getDate()==parseInt(match[2],10) && tmpdate.getFullYear()==parseInt(match[3],10) && (tmpdate.getMonth()+1)==parseInt(match[1],10))
		{ 
			return true;
		}
	}
	return false;
}

function cdate()
{
	var frm 	= document.forms["form1"];
	var date_from	= frm.date_from.value;
	var date_to	= frm.date_to.value;

	if (date_from > date_to)
	{
//		return false;
		return true;
	}
	else
	{
		return true;
	}
}

function cnum()
{
	var frm 	= document.forms["form1"];
	var lowest	= parseInt(frm.lowest.value);
	var highest	= parseInt(frm.highest.value);

	if (lowest > highest)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function Dec(MyNum) 
{ 
	var MaxDecimal	= 2;
	var theLen 	= MyNum.length; 
	var dotPos 	= MyNum.indexOf("."); 
	var thePos 	= theLen - (dotPos+1);
	var isNum 	= (isNaN(MyNum)) ? false:true; 
	var isDot 	= (dotPos != -1) ? true:false; 
	var isAt 	= (thePos <= numDec && thePos != 0) ? true:false; 
	var isOne 	= (MyNum.indexOf(".",dotPos+1) == -1) ? true:false; 

	if ((isNum) && (isDot) && (isAt) && (isOne)) 
	{ 
		return true;
	} 
	else 
	{ 
		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 "dec":
          {
               if(!Dec(objValue.value)) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name+": Invalid Format "; 
                 }
                 alert(strError); 
                 return false; 
               }
           break;
          }

        case "date":
          {
               if(!checkDate(objValue.value)) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name+": Invalid Date Format "; 
                 }//if                                               
                 alert(strError); 
                 return false; 
               }//if 
           break;
          }

	case "cdate":
	{
               if(!cdate()) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name+": Invalid Date Format "; 
                 }//if                                               
                 alert(strError); 
                 return false; 
               }//if 
           break;
	}

	case "cnum":
	{
               if(!cnum()) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name;
                 }//if                                               
                 alert(strError); 
                 return false; 
               }//if 
           break;
	}

        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.
*/