function addEvent(obj, type, fn) {

   if (obj.addEventListener) {

      obj.addEventListener(type, fn, false);

      return true;

   } else if (obj.attachEvent) {

      var r = obj.attachEvent("on"+type, fn);

      return r;

   } else {

      return false;

   }

}



function stopEvent(e) {

   if (e.stopPropagation) {

      e.stopPropagation();   // for DOM-friendly browsers

      e.preventDefault();

   } else {

      e.returnValue = false; // for IE

      e.cancelBubble = true;

   }

}



function validateRequiredRadio(field_name, error_message) {

   var fields = document.getElementsByName(field_name);

   for(var i=0;i<fields.length;i++)

      if(fields[i].checked == true)

         return "";

   return error_message;

}



function validateRequiredCheckbox(field_id, error_message) {

   var field = document.getElementById(field_id);

   if (!field.checked)

      return error_message;

   return "";    

}



function validateRequiredCheckboxFld(field_id) {

   var field = document.getElementById(field_id);

   if (!field.checked)

      return false;

   return true;    

}





function validateRequired(field_id, error_message) {

   var field = document.getElementById(field_id);

   if (trim(field.value)=="")

      return error_message;

   return "";

}



function validateRequiredFld(field_id) {

   var field = document.getElementById(field_id);

   if (trim(field.value)=="")

      return false;

   return true;

}





function validateEmailByValue(field_value, error_message)

{

    if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(field_value))

      return "";

   return error_message;

}



function validateEmail(field_id, error_message) {

   var email = document.getElementById(field_id);

   if (!checkEmail(email))

      return error_message;

   return "";

}



function validateEmailFld(field_id) {

   var email = document.getElementById(field_id);

   if (!checkEmail(email))

      return false;

   return true;

}





function checkEmail(email) {

   if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email.value))

      return true;

   return false;

}



function validateDate(day, month, year, error_message)

{

    if (!checkDate(day, month, year))

        return error_message;

    return "";    

}



function validateDateFld(day, month, year)

{

    if (!checkDate(day, month, year))

        return false;

    return true;    

}





function validateDateVal(day, month, year)

{

    if (!checkDate(day, month, year))

        return false;

    return true;    

}





function checkDate(day, month, year)

{

    var leap;

    

    if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0))     

      leap = 1;

              

   if ((month == 2) && (leap == 1) && (day > 29)) 

    return false; 

   

   if ((month == 2) && (leap != 1) && (day > 28)) 

      return false



    if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) 

      return false;

    

    return true;

}



function read_cookie(name) {

	var nameEQ = name + "=";

	var ca = document.cookie.split(';');

	for(var i=0;i < ca.length;i++) {

		var c = ca[i];

		while (c.charAt(0)==' ') c = c.substring(1,c.length);

		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);

	}

	return null;

}



function trim(str) {

   return str.replace(/^\s+|\s+$/g,"");

}