function checkForInt(evt)
  { 
    var charCode = ( evt.which ) ? evt.which : event.keyCode; 
    return  ( charCode >= 48 && charCode <= 57 ); 
  }
  
function isNumberOrDecimalKey(evt)
  {
    var charCode = (evt.which) ? evt.which : event.keyCode
    return  ((charCode >= 48 && charCode <= 57) || (charCode == 46)); 
  }