/* javascript function to update form field
 *  field		form field that is being counted
 *  count		form field that will show characters left
 *  maxchars 	maximum number of characters
*/
function characterCount(field, count, maxchars) {
  var realchars = field.value.replace(/\t|\r|\n|\r\n/g,'');
  var excesschars = realchars.length - maxchars;
  if (excesschars > 0) {
		field.value = field.value.substring(0, excesschars);
		alert("Error:\n\n- You are only allowed to enter up to"+maxchars+" characters.");
	} else {
		count.value = maxchars - realchars.length;
	}
}

function adjust_quant(adj,min)
   {
   current_val_int = Math.round( document.cart_quantity.cart_quantity.value );
   revised = current_val_int + adj;
   if ( revised < min ) {
      revised = min;
      }
   else {
      revised = Math.round( revised / Math.abs(adj) ) * Math.abs(adj);
      }
      document.cart_quantity.cart_quantity.value = revised;
      if ( document.cart_quantity.cart_quantity.value == "NaN" ) { document.cart_quantity.cart_quantity.value = min; }
   }