Coding Specialists - Need Your Help!

/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Neill Broderick :: http://www.bespoke-software-solutions.co.uk/downloads/downjs.php */

var mins
var secs;

function cd() {
     mins = 1 * m("10"); // change minutes here
     secs = 0 + s(":01"); // change seconds here (always add an additional second to your total)
     redo();
}

function m(obj) {
     for(var i = 0; i < obj.length; i++) {
          if(obj.substring(i, i + 1) == ":")
          break;
     }
     return(obj.substring(0, i));
}

function s(obj) {
     for(var i = 0; i < obj.length; i++) {
          if(obj.substring(i, i + 1) == ":")
          break;
     }
     return(obj.substring(i + 1, obj.length));
}

function dis(mins,secs) {
     var disp;
     if(mins <= 9) {
          disp = " 0";
     } else {
          disp = " ";
     }
     disp += mins + ":";
     if(secs <= 9) {
          disp += "0" + secs;
     } else {
          disp += secs;
     }
     return(disp);
}

function redo() {
     secs--;
     if(secs == -1) {
          secs = 59;
          mins--;
     }
     document.cd.disp.value = dis(mins,secs); // setup additional displays here.
     if((mins == 0) && (secs == 0)) {
          window.alert("Time is up. Press OK to continue."); // change timeout message as required
          // window.location = "yourpage.htm" // redirects to specified page once timer ends and ok button is pressed
     } else {
         cd = setTimeout("redo()",1000);
     }
}

function init() {
  cd();
}
window.onload = init;