function isValidEmail(objEmail, required) {
    email = objEmail.value;	
	
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        
		
		
		}
        return true;
    }
    if (email.length==0) {  
  
	 if (required) {
            
			return false;

		}

        return true;
    
	}
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    }
	
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

function isEmpty(objField,fieldname)
	{
	
	if(objField.value=="")
		{
		alert("Please Enter "+fieldname);
		objField.focus();
		return(true);
		}
	return(false);
	}