fittext.js

/*!	
* FitText.js 1.0 jQuery free version
*
* Copyright 2011, Dave Rupert http://daverupert.com 
* Released under the WTFPL license 
* http://sam.zoy.org/wtfpl/
* Modified by Slawomir Kolodziej http://slawekk.info
*
* Date: Tue Aug 09 2011 10:45:54 GMT+0200 (CEST)
*/
(function(){
  var css = function (el, prop) {
    return window.getComputedStyle ? getComputedStyle(el).getPropertyValue(prop) : el.currentStyle[prop];
  };
  
  var addEvent = function (el, type, fn) {
    if (el.addEventListener)
      el.addEventListener(type, fn, false);
		else
			el.attachEvent('on'+type, fn);
  };

  window.fitText = function (el, kompressor) {

    var settings = {
      'minFontSize' : -1/0,
      'maxFontSize' : 1/0
    };

    var fit = function (el) {
      var compressor = kompressor || 1;

      var resizer = function () {
        el.style.fontSize = Math.max(Math.min(el.clientWidth / (compressor*10), parseFloat(settings.maxFontSize)), parseFloat(settings.minFontSize)) + 'px';
      };

      // Call once to set.
      resizer();

      // Bind events
      // If you have any js library which support Events, replace this part
      // and remove addEvent function (or use original jQuery version)
      addEvent(window, 'resize', resizer);
    };

    if (el.length)
      for(var i=0; i<el.length; i++)
        fit(el[i]);
    else
      fit(el);

    // return set of elements
    return el;
  };
})();