var Shadowbox = {};

Shadowbox.lib = function(){

    var styleCache = {};
    var camelRe = /(-[a-z])/gi;
    var camelFn = function(m, a){
        return a.charAt(1).toUpperCase();
    };
    var toCamel = function(style){
        var camel;
        if(!(camel = styleCache[style])){
            camel = styleCache[style] = style.replace(camelRe, camelFn);
        }
        return camel;
    };

    var view = document.defaultView;
    var alphaRe = /alpha\([^\)]*\)/gi;
    
    var setOpacity = function(el, opacity){
        var s = el.style;
        if(window.ActiveXObject){ 
            s.zoom = 1; 
            s.filter = (s.filter || '').replace(alphaRe, '') +
                (opacity == 1 ? '' : ' alpha(opacity=' + (opacity * 100) + ')');
        }else{
            s.opacity = opacity;
        }
    };

    return {

        adapter: 'standalone',
     
        getStyle: function(){
            return view && view.getComputedStyle
                ? function(el, style){
                    var v, cs, camel;
                    if(style == 'float') style = 'cssFloat';
                    if(v = el.style[style]) return v;
                    if(cs = view.getComputedStyle(el, '')){
                        return cs[toCamel(style)];
                    }
                    return null;
                }
                : function(el, style){
                    var v, cs, camel;
                    if(style == 'opacity'){
                        if(typeof el.style.filter == 'string'){
                            var m = el.style.filter.match(/alpha\(opacity=(.+)\)/i);
                            if(m){
                                var fv = parseFloat(m[1]);
                                if(!isNaN(fv)) return (fv ? fv / 100 : 0);
                            }
                        }
                        return 1;
                    }else if(style == 'float'){
                        style = 'styleFloat';
                    }
                    var camel = toCamel(style);
                    if(v = el.style[camel]) return v;
                    if(cs = el.currentStyle) return cs[camel];
                    return null;
                };
        }(),
        
        setStyle: function(el, style, value){
            if(typeof style == 'string'){
                var camel = toCamel(style);
                if(camel == 'opacity'){
                    setOpacity(el, value);
                }else{
                    el.style[camel] = value;
                }
            }else{
                for(var s in style){
                    this.setStyle(el, s, style[s]);
                }
            }
        },
        
        get: function(el){
            return typeof el == 'string' ? document.getElementById(el) : el;
        },
        
        remove: function(el){
            el.parentNode.removeChild(el);
        },
        
        getTarget: function(e){
            var t = e.target ? e.target : e.srcElement;
            return t.nodeType == 3 ? t.parentNode : t;
        },
        
        getPageXY: function(e){
            var x = e.pageX || (e.clientX +
                (document.documentElement.scrollLeft || document.body.scrollLeft));
            var y = e.pageY || (e.clientY +
                (document.documentElement.scrollTop || document.body.scrollTop));
            return [x, y];
        },
        
        preventDefault: function(e){
            if(e.preventDefault){
                e.preventDefault();
            }else{
                e.returnValue = false;
            }
        },
        
        keyCode: function(e){
            return e.which ? e.which : e.keyCode;
        },
       
        addEvent: function(el, name, handler){
            if(el.addEventListener){
                el.addEventListener(name, handler, false);
            }else if(el.attachEvent){
                el.attachEvent('on' + name, handler);
            }
        },
        
        removeEvent: function(el, name, handler){
            if(el.removeEventListener){
                el.removeEventListener(name, handler, false);
            }else if(el.detachEvent){
                el.detachEvent('on' + name, handler);
            }
        },
        
        append: function(el, html){
            if(el.insertAdjacentHTML){
                el.insertAdjacentHTML('BeforeEnd', html);
            }else if(el.lastChild){
                var range = el.ownerDocument.createRange();
                range.setStartAfter(el.lastChild);
                var frag = range.createContextualFragment(html);
                el.appendChild(frag);
            }else{
                el.innerHTML = html;
            }
        }

    };

}();