/*  $(element).findAncestor(cssRule) -> HTMLElement | undefined
 *  element azon szulojet (tetszoleges melysegben) keresi amelyre illeszkedik cssRule szabaly
 *  az elso talalatot adja vissza
 */
Element.addMethods({
    findAncestor: function( element, cssRule) {
        return element.ancestors().find( function( el) {
            return el.match(cssRule);
        });
    }
});


function addEvent( obj, type, fn ) {
  if ( obj.attachEvent ) {
    obj['e'+type+fn] = fn;
    obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
    obj.attachEvent( 'on'+type, obj[type+fn] );
  } else
    obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
  if ( obj.detachEvent ) {
    obj.detachEvent( 'on'+type, obj[type+fn] );
    obj[type+fn] = null;
  } else
    obj.removeEventListener( type, fn, false );
}

/* createElement helyettesito */

function $E(data) {
    var el;
    if ('string'==typeof data) {
        el=document.createTextNode(data);
    } else {
        //create the element
        el=document.createElement(data.tag);
        delete(data.tag);

        //append the children
        if ('undefined'!=typeof data.children) {
            if ('string'==typeof data.children ||
                'undefined'==typeof data.children.length
            ) {
                //strings and single elements
                el.appendChild($E(data.children));
            } else {
                //arrays of elements
                for (var i=0, child=null; 'undefined'!=typeof (child=data.children[i]); i++) {
                    el.appendChild($E(child));
                }
            }
            delete(data.children);
        }

        //any other data is attributes
        for (attr in data) {
            el[attr]=data[attr];
        }
    }

    return el;
}