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;
	this.hasPhoto=false;
}
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,extra)
{
  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, extra);
	}
  itemobj.validationset.add(descriptor,errstr, extra);
}
function ValidationDesc(inputitem,desc,error,extra)
{
  this.desc=desc;
  this.extra=extra;
	this.error=error;
	this.itemobj = inputitem;
	this.validate=vdesc_validate;
}
function vdesc_validate()
{
 if(!V2validateData(this.desc,this.itemobj,this.error,this.extra))
 {
    this.itemobj.focus();
    return false;
 }
 return true;
}
function ValidationSet(inputitem, extra)
{
    this.vSet=new Array();
    this.extra=extra;
    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,this.extra);
}
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,extra) 
{ 
    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 + " : Πεδίο υποχρεώτικό"; 
              }//if 
              alert(strError); 
              return false; 
           }//if 
           break;             
         }//case required 
        case "maxlength": 
        case "maxlen": 
          { 
             if ( (objValue.value.length>0) && (eval(objValue.value.length) >  eval(cmdvalue)) )
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : "+cmdvalue+" caracteres maximo "; 
               }//if 
               alert(strError); 
               return false; 
             }//if 
             break; 
          }//case maxlen 
        case "minlength": 
        case "minlen": 
           { 
             if ( (objValue.value.length>0) && (eval(objValue.value.length) <  eval(cmdvalue)) )
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : " + cmdvalue + " caracteres minimo  "; 
               }//if               
               alert(strError); 
               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+": Solamente caracteres alfa-numericos "; 
                }//if 
                alert(strError + "\n [Error caracter posicion " + 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+": Solamente caracteres numericos "; 
                }//if               
                alert(strError + "\n [Error caracter posicion " + 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+": Solamente letras "; 
                }//if                             
                alert(strError + "\n [Error caracter posicion " + 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+": Μην αποδεκτή διεύθυνση e-mail "; 
                 }//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 + " : η τιμή πρέπει να είναι μικρότερη από "+ 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 + " : η τιμή πρέπει να είναι μεγαλύτερη από "+ 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+": Μην αποδεκτές χαρακτήρες "; 
	              }//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+": Παρακαλώ, επιλέξτε μία από τις επιλογές "; 
              }//if                                                               
              alert(strError); 
              return false;                                   
             } 
             break; 
         }//case dontselect 
	 case "for": 
         {   
   	
           if (objValue.value=='') {
                strError = strError + objValue.name + " : Πεδίο υποχρεώτικό"; 
               alert(strError);              	
               return false;                  
           }//if 
                         	         	      	
           if (objValue.value!='') {
         	   //var imgf = new String(objValue);
         	   imgf=objValue.value;
	           realimgf=imgf;
	           lastSeparator=imgf.lastIndexOf('\\');
	           if (lastSeparator<0) lastSeparator=imgf.lastIndexOf('/');
	           if (lastSeparator>0)
	             imgf=imgf.substr(lastSeparator+1,imgf.length-lastSeparator);
	           imgext=imgf.substr(imgf.indexOf('.')+1,3);

             if ((imgf!='') && ((imgext.toUpperCase() == 'SWF') || (imgext.toUpperCase() == 'JPG') || (imgext.toUpperCase() == 'JPE') || (imgext.toUpperCase() == 'GIF')) )
	     {        	       
	       eval('document.forma.imgfilename'+extra+'.value=imgf;');
	       eval('document.forma.realimgfilename'+extra+'.value=realimgf;');
	       //alert(document.forma.realimgfilename.value);
             }
             else if (imgf!='') {
               alert(strError);              	
               return false;  
             }
           }	
           
           break; 
         }         
	 case "fot": 
         {          	
  
           if (objValue.value!='') {
         	   //var imgf = new String(objValue);
         	   imgf=objValue.value;
	           realimgf=imgf;	          
	           lastSeparator=imgf.lastIndexOf('\\');
	           if (lastSeparator<0) lastSeparator=imgf.lastIndexOf('/');
	           if (lastSeparator>0)
	             imgf=imgf.substr(lastSeparator+1,imgf.length-lastSeparator);
	           imgext=imgf.substr(imgf.indexOf('.')+1,3);

             if ((imgf!='') && ((imgext.toUpperCase() == 'SWF') || (imgext.toUpperCase() == 'JPG') || (imgext.toUpperCase() == 'JPE') || (imgext.toUpperCase() == 'GIF')) )
	     {        	       
	       eval('document.forma.imgfilename'+extra+'.value=imgf;');
	       eval('document.forma.realimgfilename'+extra+'.value=realimgf;');
	       //alert(document.forma.realimgfilename.value);
             }
             else if (imgf!='') {
               alert(strError);              	
               return false;  
             }
           }	
           
           break; 
         }//case doc         
	 case "pdf": 
         {        
      	  
           if (objValue.value!='') {
         	   pdff=objValue.value;
	           realpdff=pdff;
	           lastSeparator=pdff.lastIndexOf('\\');
	           if (lastSeparator<0) lastSeparator=pdff.lastIndexOf('/');
	           if (lastSeparator>0)
	             pdff=pdff.substr(lastSeparator+1,pdff.length-lastSeparator);
	           pdfext=pdff.substr(pdff.indexOf('.')+1,3);
             if ((pdff!='') && ((pdfext.toUpperCase() == 'PDF') || (pdfext.toUpperCase() == 'DOC')) )
	        {        	       
	         eval('document.forma.pdffilename'+extra+'.value=pdff;');
	         eval('document.forma.realpdffilename'+extra+'.value=realpdff;');
	         //eval('alert(document.forma.realpdffilename'+extra+'.value);');
            }
            else if (pdff!='') {
              alert(strError);              	
              return false;  
            }
           }	
           
           break; 
         }//case pdf
	 case "zip": 
         {       
   	   	
           if (objValue.value!='') {
         	   zipf=objValue.value;
	           realzipf=zipf;
	           lastSeparator=zipf.lastIndexOf('\\');
	           if (lastSeparator<0) lastSeparator=zipf.lastIndexOf('/');
	           if (lastSeparator>0)
	             zipf=zipf.substr(lastSeparator+1,zipf.length-lastSeparator);
	           zipext=zipf.substr(zipf.indexOf('.')+1,3);

             if ((zipf!='') && (zipext.toUpperCase() == 'ZIP') )
	     {        	       
	       eval('document.forma.zipfilename'+extra+'.value=zipf;');
	       eval('document.forma.realzipfilename'+extra+'.value=realzipf;');
	       //alert(document.forma.realimgfilename.value);
             }
             else if (zipf!='') {
               alert(strError);              	
               return false;  
             }
           }	
           
           break; 
         }//case zip 
                  
    }//switch 
    return true; 
}