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())
		{
		  //this.valid.value = 'false';
		  return false;
		}
	}
	if(this.addnlvalidation)
	{
	  str =" var ret = "+this.addnlvalidation+"()";
	  eval(str);
    if(!ret) return ret;
	}
	//this.valid.value = 'true';
	ajaxformsub(this);
	return false;
}
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))
 {	
	
		return false;
 }
 return true;
}
function focusobject(itemobj){
 if(itemobj.type.match(/select/gi))
	 {
	 	itemobj.selectedIndex=0;
		itemobj.focus();
	 }
	 else
    	itemobj.select();	
}
function confirmselect(obj){
	if(obj.type.match(/select/gi)){
		if(obj.selectedIndex == -1)	return false;
		if(obj.selectedIndex != 0 ) return true;
	}
	if(obj.type.match(/checkbox/gi))
		if(obj.checked)	return true;
	if(obj.type.match(/^(file|password|text)/gi))
		if(obj.value != '')	return true;
	return false;
}
function getselectedvalue(obj){
	if(obj.type.match(/select/gi)){ 
		return obj.options[obj.selectedIndex].value;		
	}
	if(obj.type.match(/checkbox/gi))
		if(obj.checked)	return true;
	if(obj.type.match(/^(file|password|text)/gi))
		if(obj.value != '')	return obj.value;
	return false;
}
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": 
		case "noselectconfirm": 
         { 
		 if(!confirmselect(objValue))
           //if(eval(objValue.value.length) == 0) 
           { 
              if(!strError || strError.length ==0) 
              { 
                strError = objValue.name + " : Required Field"; 
				if(command == "noselectconfirm")
				strError = objValue.name + " : Not selected"; 
              }//if 
			  if(command == "noselectconfirm")
			  return confirm(strError); 
              alert(strError);
			  focusobject(objValue);
              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 + " ]");
			   focusobject(objValue);
               return false; 
             }//if 
             break; 
          }//case maxlen 
        case "minlength": 
        case "minlen": 
           { 
		   if(eval(objValue.value.length)==0)
		  		return true;
             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 + " ]");
			   focusobject(objValue);
               return false;                 
             }//if 
             break; 
            }//case minlen
// frmvalidator.addValidation("UserPword","minlength=6","Password must be at least 6 characters long.");
        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)+"]"); 				focusobject(objValue);
                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)+"]"); 				focusobject(objValue);
                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)+"]"); 				focusobject(objValue);
                return false; 
              }//if 
              break; 
           }//alpha 
//This validation is used for the 09.,/-+:*
		case "numhyphen":
			{
              var charpos = objValue.value.search("[^0-9\-/.+,:*_]"); 
              if(objValue.value.length > 0 &&  charpos >= 0) 
              { 
                  if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+": characters allowed are 0-9,-,/,.,:,*,,+ and _"; 
                }//if                             
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 				focusobject(objValue);
                return false; 
              }//if 			
			break;
			}
			
//This validation is used for the email
        case "email": 
          { 
               if(!validateEmailv2(objValue.value)) 
               { 
                 if(!strError || strError.length ==0) 
                 { 
                    strError = objValue.name+": Enter a valid Email address "; 
                 }//if                                               
                 alert(strError); 
				 focusobject(objValue);
                 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); 
			  focusobject(objValue);
              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);
			   focusobject(objValue);
               return false;                 
             }//if             
            break; 
         }//case greaterthan 
        case "regexp": 
         { 
		 	if(objValue.value.length > 0)
			{	alert(cmdvalue);			
	            if(objValue.value.match(cmdvalue)) 
	            { 
	              if(!strError || strError.length ==0) 
	              { 
	                strError = objValue.name+": Invalid characters found "; 
	              }//if                                                               
	              alert(strError); 
				  focusobject(objValue);
	              return false;                   
	            }//if 
			}
           break; 
         }//case regexp 
		 
		 case "nospace": 
         { 
		 	if(objValue.value.length > 0)
			{				
				if(objValue.value.match(/\s/g)) 
	            { 
	              if(!strError || strError.length ==0) 
	              { 
	                strError = objValue.name+": Invalid characters found "; 
	              }//if                                                               
	              alert(strError);
				  focusobject(objValue);
	              return false;                   
	            }//if 
			}
           break; 
         }//case nospace 
        case "dontselect": 
         { 
            if(objValue.selectedIndex == null) 
            { 
              alert("BUG: dontselect command for non-select Item"); 
              return false; 
            } 
            if(objValue.selectedIndex ==0) 
            { 
             if(!strError || strError.length ==0) 
              { 
              strError = objValue.name+": Please Select one option "; 
              }//if                                                               
              alert(strError); 
			  focusobject(objValue);
              return false;                                   
             } 
             break; 
         }//case dontselect 
		 
		case "match":
		{
			var el;
			if (cmdvalue == ''){
				alert('BUG: Match field required for '+objValue.name); 
				return false;
			}			
			var f= document.getElementById(cmdvalue).value;
			if(f!=objValue.value)
			{
				if(!strError || strError.length ==0) 
				{ 
				  strError = objValue.name+": Please Reenter your data correctly "; 
				}//if                                                               
				alert(strError); 
				focusobject(document.getElementById(cmdvalue));
				return false;                                   
			} 
			break; 
         }//case match
// Example=====> frmvalidator.addValidation("2nd field id","match=1st field id","write message here");
// frmvalidator.addValidation("UserNewUname","match=UserUname","Confirm User Name should match with New User Name.");

		  case "couplereq": 
		  case "couplerequired": 
         {
			 var el; 
			 if (cmdvalue == ''){
				alert('BUG: Field required to couple with '+objValue.name); 
				return false;
			}
			el = document.getElementById(cmdvalue);
			if(confirmselect(objValue))
				if(!confirmselect(el)){
					if(!strError || strError.length ==0) 
              		{ 
              			strError = objValue.name+": Please Fill coupled field."; 
              		}//if                                                               
              		alert(strError);
					focusobject(el);
              		return false;                                   
             } 
             break; 
         }//case couplereq
// Example=====> frmvalidator.addValidation("1st field id","couplerequired=2nd field id","write message here");
// frmvalidator.addValidation("University","couplerequired=Qualification","Please Select Qualification");

		 case "multiselect": 
         {
			 var el; var splitted; var count=0; var no=1;
			 if(!(splitted = cmdvalue.match(/^(\d{0,})*\((.+)\)$/))){
				strError ='Group fields required.'+objValue.name; 
				return false;
			}
			if(splitted[1])
				no = splitted[1];
			var arr = splitted[2].split(',');
			if(confirmselect(objValue))
					count++;
			for(var itr=0;itr < arr.length;itr++)
			{
				if(confirmselect(document.getElementById(arr[itr])))
					count++;
			}	
			if(no > count){
				if(!strError || strError.length ==0) 
              	{ 
              		strError = objValue.name+": Please Select "+no+" options of group."; 
              	}//if                                                               
              	alert(strError); 
				focusobject(objValue);
              	return false;                                   
             } 
             break; 
         }//case multiselect
// Example=====> frmvalidator.addValidation("1st field id","multiselect=write here no. of fields make to be compulsory(2nd field id,3rd field id and so on...........)","write message here");
// frmvalidator.addValidation("LeadPhHome","multiselect=1(LeadPhWork,LeadPhMobile)","Home Phone OR Work Phone OR Mobile No. is Required.");
		 
		 case "validateconditional": 
         {
			 var el; var splitted; var count=0; var condition;
			 if(!(splitted = cmdvalue.match(/^(.+)\((.+)\)$/))){
				strError ='Group fields required.'+objValue.name; 
				return false;
			}
			//alert(splitted[1]); alert(splitted[2]); 
			condition = splitted[1];
			if(eval("'"+(getselectedvalue(objValue)).toLowerCase()+"'=='"+condition.toLowerCase()+"'")){
			/* var arr = splitted[2].split(',');
			 var pattern = /[A-Za-z]/;
			alert(condition.search(pattern));*/
				if(!confirmselect(document.getElementById(splitted[2]))){
					
					if(!strError || strError.length ==0) 
					{ 
						strError = objValue.name+": Please Select "+no+" options of group."; 
					}//if                                                               
					alert(strError); 
					focusobject(document.getElementById(splitted[2]));
					return false;                                   
				 } 
			}
             break; 
         }//case couplereq
// Example=====> frmvalidator.addValidation("1st field id","validateconditional=write here value or text of the 2nd field(2nd field id)","write message here");
//frmvalidator.addValidation("CandidateCityHome","validateconditional=other(CandidateCity1)","Please Enter Other City Name");
		 
    }//switch 
    return true; 
}