function numbersonly(myfield, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) ||
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789.").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
}

function onlynumbers(e){

	if(window.event) // IE
  	{
	  keynum = e.keyCode;
	} else if(e.which) // Netscape/Firefox/Opera
	  {
	  keynum = e.which;
	  }
	key = String.fromCharCode(keynum);
	var reg = /[0-9\-\+\)\(]$/i;
	if ((keynum==null) || (keynum==0) || (keynum==8) || (keynum==9) || (keynum==13) || (keynum==27) )
   		return true;
	return reg.test(key);

}