/**
 * @author Julenka
 */

var _selected_blurb = 'home';
var _selected_nav = 'home';
var _sections = ["home", "research", "projects", "fun", "cv"];
var _TIMEOUT = 10000;
var _timer;
var _selected_cell = "";

function onLoad() {
    // Set all the navigation buttons to be opacity 0.5
    setOpacity('btn-sm-home', 0.5);
    setOpacity('btn-sm-research', 0.5);
    setOpacity('btn-sm-projects', 0.5);
    setOpacity('btn-sm-fun', 0.5);
    setOpacity('btn-sm-blog', 0.5);

    highlightCell('bits');
}

function setOpacity(elem_name, value){
    var useOpacity =   (typeof document.createElement("div").style.opacity != 'undefined');

    if(useOpacity){
      new Effect.Morph(elem_name, {
	style: 'opacity:' + value,
			   duration: 0.2
			   });
    } else {
      // use filter
      new Effect.Morph(elem_name, {
	  style: 'filter=alpha(opacity='+value+');',
			   duration: 0.2
			   });
    }

}

function highlightCell(id){
/*   if (_selected_cell != "" && id != _selected_cell) {
      setOpacity(_selected_cell, 0.7);

    } 
      setOpacity(id, 1.0);
    _selected_cell = id;*/

}
function highlightNav(id){
    if($('btn-' + _selected_nav) == null) {
        // handle case of sm-buttons
        _selected_nav = "sm-" + _selected_nav;
    }

    // set flags for whether we should use opacity or filter with
    // this browser (or browser mode). we prefer opacity.
    if (id != _selected_nav) {

      setOpacity('btn-'+_selected_nav, 0.5);
      setOpacity('btn-'+id, 1.0);
        _selected_nav = id;
    } 
}