number formatting and variables

[alihaydar]

how can i do this in javascript:

an input box, and a button

if someone enter "5" and press the button the page loads to 0005.htm
if someone enter "755" & press the button the page loads to 0755.htm
if someone enter a number bigger than 9999 the page loads to 9999.htm

thanx for any help

[acoder]

function loadPage(val) {
  var zeros = "";
  var num = parseInt(val);
  if (num > 9999) num = 9999;
  if (num < 1000) zeros += "0";
  if (num < 100) zeros += "0";
  if (num < 10) zeros += "0";
  location.href = zeros+num+".htm";
}