/*
Author: mg12
Update: 2008/11/21
Author URI: http://www.neoease.com/
*/
(function() {

function $(id) {
    return document.getElementById(id);
}

function setStyleDisplay(id, status) {
    $(id).style.display = status;
}

function goTop(acceleration, time) {
    acceleration = acceleration || 0.1;
    time = time || 16;

    var dx = 0;
    var dy = 0;
    var bx = 0;
    var by = 0;
    var wx = 0;
    var wy = 0;

    if (document.documentElement) {
        dx = document.documentElement.scrollLeft || 0;
        dy = document.documentElement.scrollTop || 0;
    }
    if (document.body) {
        bx = document.body.scrollLeft || 0;
        by = document.body.scrollTop || 0;
    }
    var wx = window.scrollX || 0;
    var wy = window.scrollY || 0;

    var x = Math.max(wx, Math.max(bx, dx));
    var y = Math.max(wy, Math.max(by, dy));

    var speed = 1 + acceleration;
    window.scrollTo(Math.floor(x / speed), Math.floor(y / speed));
    if(x > 0 || y > 0) {
        var invokeFunction = "MGJS.goTop(" + acceleration + ", " + time + ")"
        window.setTimeout(invokeFunction, time);
    }
}

function switchTab(showPanels, hidePanels, activeTab, activeClass, fadeTab, fadeClass) {
    $(activeTab).className = activeClass;
    $(fadeTab).className = fadeClass;

    var panel, panelList;
    panelList = showPanels.split(',');
    for (var i = 0; i < panelList.length; i++) {
        var panel = panelList[i];
        if ($(panel)) {
            setStyleDisplay(panel, 'block');
        }
    }
    panelList = hidePanels.split(',');
    for (var i = 0; i < panelList.length; i++) {
        panel = panelList[i];
        if ($(panel)) {
            setStyleDisplay(panel, 'none');
        }
    }
}

window['MGJS'] = {};
window['MGJS']['$'] = $;
window['MGJS']['setStyleDisplay'] = setStyleDisplay;
window['MGJS']['goTop'] = goTop;
window['MGJS']['switchTab'] = switchTab;

})();

function switchImage(imageId, imageUrl, linkId, linkUrl, preview, title, alt) {
    if(imageId && imageUrl) {
        var image = $(imageId);
        image.src = imageUrl;

        if(title) {
            image.title = title;
        }
        if(alt) {
            image.alt = alt;
        }
    }

    if(linkId && linkUrl) {
        var link = $(linkId);
        link.href = linkUrl;
    }
}