NAME

Foorum::Manual::Tutorial4 - Tutorial 4: jQuery javascript framework

Short Introducation

jQuery is a fast, concise, JavaScript Library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your web pages.

There are a lot of javascript frameworks: prototype, mootool, dojo, YUI etc. Yet why we pick up jquery is just a matter of taste. (Dude, I can't tell more, that's just personal feeling.)

Used in Foorum

We load jquery in every page by default.

• disable Submit button when submit() form to avoid duplicate submit. ``` $(document.forms).each( function(theform) {

  // disabled the Submit and Reset when submit a form
  // to avoid duplicate submit
  $(theform).submit( function() {
      $('input:submit').attr( { disabled : 'disabled' } );
      $('input:reset').attr(  { disabled : 'disabled' } );
  } );
  
  // Press Ctrl+Enter to submit the form. like QQ.
  $(theform).keypress( function(evt) {
      var x = evt.keyCode;
      var q = evt.ctrlKey;
  
      if (q && (x == 13 || x == 10)) {
          theform.submit();
      }
  } );
  

  } ); ```

• timezone auto-detection. 2008-01-17 15:46:33 in my local time, meanwhile that's 2008-01-17 16:46:33 in your computer. that's provided by this piece of code. (put class="date" in MySQL DateTime format span. 2008-01-17 15:46:33) ``` // follows are copied from datePicker/date.js // utility method var _zeroPad = function(num) { var s = '0'+num; return s.substring(s.length-2) //return ('0'+num).substring(-2); // doesn't work on IE :( };

  $(".date").each(function (i) { var s = $(this).text(); if (! s) { return false; }

  var f = this.id; //format
  if (! f) {
      f = 'yyyy-mm-dd hh:ii:ss';
  }
  
  var d = new Date(1997, 1, 1, 1, 1, 1);
  var iY = f.indexOf('yyyy');
  if (iY > -1) {
      d.setFullYear(Number(s.substr(iY, 4)));
  }
  var iM = f.indexOf('mm');
  if (iM > -1) {
      d.setMonth(Number(s.substr(iM, 2)) - 1);
  }
  d.setDate(Number(s.substr(f.indexOf('dd'), 2)));
  d.setHours(Number(s.substr(f.indexOf('hh'), 2)));
  d.setMinutes(Number(s.substr(f.indexOf('ii'), 2)));
  d.setSeconds(Number(s.substr(f.indexOf('ss'), 2)));
  
  var timezoneOffset = -(new Date().getTimezoneOffset());
  d.setMinutes(d.getMinutes() + timezoneOffset);
  
  if (! isNaN(d.getFullYear()) && d.getFullYear() > 1997) {
      var t = f
          .split('yyyy').join(d.getFullYear())
          .split('mm').join(_zeroPad(d.getMonth()+1))
          .split('dd').join(_zeroPad(d.getDate()))
          .split('hh').join(_zeroPad(d.getHours()))
          .split('ii').join(_zeroPad(d.getMinutes()))
          .split('ss').join(_zeroPad(d.getSeconds()))
          ;
  
      $(this).text(t);
  }
  

  } ); ```

Above code is from http://foorum.googlecode.com/svn/trunk/root/static/js/utils.js it may be changed later.

jQuery UI

http://ui.jquery.com/

We are using Tabs. http://dev.jquery.com/view/tags/ui/1.0.1a/demos/ui.tabs.html

SEE ALSO

Tutorial1, Tutorial2, Tutorial3, Tutorial5