function getId(name) {
    return document.getElementById(name);
}

function getClasses(name,type) {
    var r = [];
    var re = new RegExp("(^|\\s)" + name + "(\\s|$)");
    var e = document.getElementsByTagName(type || "*");
    for ( var j = 0; j < e.length; j++ ){
        if ( re.test(e[j].className) ) r.push( e[j] );
	}
    return r;
}

function getTag( name, root ) {
    return ( root || document ).getElementsByTagName( name );
}


function scrollX() {
    var de = document.documentElement;
    return self.pageXOffset || ( de && de.scrollLeft ) || document.body.scrollLeft;
}

function scrollY() {
   var de = document.documentElement;
   return self.pageYOffset || ( de && de.scrollTop ) || document.body.scrollTop;
}

function windowHeight() {
    var de = document.documentElement;
    return self.innerHeight || ( de && de.clientHeight ) || document.body.clientHeight;
}


function windowWidth() {
   var de = document.documentElement;
	return self.innerWidth || ( de && de.clientWidth ) || document.body.clientWidth;
}

function getHeight( elem ) {
    return parseInt( getStyle( elem, "height" ) );
}

function getWidth( elem ) {
    return parseInt( getStyle( elem, "width" ) );
}


function pageHeight() {
    return document.body.scrollHeight;
}

function pageWidth() {
    return document.body.scrollWidth;
}

function setX(elem, pos) {
    elem.style.left = pos + "px";
}

function setY(elem, pos) {
    elem.style.top = pos + "px";
}

function getStyle( elem, name ) {
    if (elem.style[name]){
        return elem.style[name];
	}
    else if (elem.currentStyle){
        return elem.currentStyle[name];
	}
    else if (document.defaultView && document.defaultView.getComputedStyle) {
        name = name.replace(/([A-Z])/g,"-$1");
        name = name.toLowerCase();

        var s = document.defaultView.getComputedStyle(elem,"");
        return s && s.getPropertyValue(name);
    } 
	else{
        return null;
	}
}

function fadeIn( elem, to, speed ) {
    setOpacity(elem, 0);
    show(elem);
    for ( var i = 0; i <= 100; i += 5 ) {
        (function(){
        		var opacity = i;
				setTimeout(function(){
					setOpacity( elem, ( opacity / 100 ) * to );
				}, ( i + 1 ) * speed );
			})();
    }
}

function hide( elem ) {
    var curDisplay = getStyle( elem, "display" );
    if ( curDisplay != "none" ){
        elem.$oldDisplay = curDisplay;
	}
    elem.style.display = "none";
}


function show( elem ) {
    elem.style.display = elem.$oldDisplay || "block";
}

function setOpacity( elem, level ) {
    if ( elem.filters ){
        elem.style.filters = 'alpha(opacity=' + level + ')';
	}
    else{
        elem.style.opacity = level / 100;
	}
}


function fadeOut( elem, to, speed ) {
    for ( var i = 0; i < 100; i += 5 ) {
        (function(){
        	var opacity = i;
			setTimeout(function(){
                setOpacity( elem, 100 - opacity );
                if ( opacity == 95 )
                    hide( elem );

            }, ( i + 1 ) * speed );
        })();
    }
}

function next( elem ) {
    do {
        elem = elem.nextSibling;
    } while ( elem && elem.nodeType != 1 );
    return elem;
}

function prev( elem ) {
    do {
        elem = elem.previousSibling;
    } while ( elem && elem.nodeType != 1 );
    return elem;
}