/*
*
* Copyright (c) 2007 Andrew Tetlaw & Millstream Web Software
* http://millstream.com.au/view/code/simple-rollovers-with-prototype/
* Version: 1.0 2007-07-08
* 
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* * 
*/
var Rollovers = function(opt){
  var o = opt;
  var load = function() {
    $A(o.selector).each(function(s) {
      $$(s).each(
        function(i) {
          var os = i.src, ni = document.createElement('img');
          $(i).observe('mouseout', function(e){i.src = os;});
          ni.src = o.srcFunction(i,o);
          i.observe('mouseover', function(e){i.src = ni.src;});
        }
      );
    });
  };
  if(window.FastInit) {
  	FastInit.addOnLoad(load);
  } else {
  	Event.observe(window, 'load', load);
  }
}
Rollovers({
  selector : ['img.roll'],
  srcFunction : function(i, o) {
    return i.src.replace(/(.*)\.(jpg|gif|png)$/i, "$1-over.$2");
  }
});