<!-- Begin
function Checknumber(fld,e) {

var strCheck = '0123456789';

var whichCode = (window.Event) ? e.which : e.keyCode;
if (whichCode == 13) return true;  // Enter
key = String.fromCharCode(whichCode);  // Get key value from key code
if (strCheck.indexOf(key) == -1) return false;  // Not a valid key

}
//  End -->