var popup_dragging = false;
var popup_target;
var popup_mouseX;
var popup_mouseY;
var popup_mouseposX;
var popup_mouseposY;
var popup_oldfunction;
function popup_display(x) {
    var win = window.open();
    for (var i in x) win.document.write(i + ' = ' + x[i] + '<br>');
}
function popup_mousedown(e) {
    var ie = navigator.appName == "Microsoft Internet Explorer";
    if (ie && window.event.button != 1) return;
    if (!ie && e.button != 0) return;
    popup_dragging = true;
    popup_target = this['target'];
    popup_mouseX = ie ? window.event.clientX : e.clientX;
    popup_mouseY = ie ? window.event.clientY : e.clientY;
    if (ie)
        popup_oldfunction = document.onselectstart;
    else popup_oldfunction = document.onmousedown;
    if (ie)
        document.onselectstart = new Function("return false;");
    else document.onmousedown = new Function("return false;");
}
function popup_mousemove(e) {
    if (!popup_dragging) return;
    var ie = navigator.appName == "Microsoft Internet Explorer";
    var element = document.getElementById(popup_target);
    var mouseX = ie ? window.event.clientX : e.clientX;
    var mouseY = ie ? window.event.clientY : e.clientY;
    element.style.left = (element.offsetLeft + mouseX - popup_mouseX) + 'px';
    element.style.top = (element.offsetTop + mouseY - popup_mouseY) + 'px';
    popup_mouseX = ie ? window.event.clientX : e.clientX;
    popup_mouseY = ie ? window.event.clientY : e.clientY;
}

function popup_mouseup(e) {
    if (!popup_dragging) return;
    popup_dragging = false;
    var ie = navigator.appName == "Microsoft Internet Explorer";
    var element = document.getElementById(popup_target);
    if (ie)
        document.onselectstart = popup_oldfunction;
    else document.onmousedown = popup_oldfunction;
}
function popup_exit(e) {
    var ie = navigator.appName == "Microsoft Internet Explorer";
    var element = document.getElementById(popup_target);
    popup_mouseup(e);
    element.style.visibility = 'hidden';
    element.style.display = 'none';
}
function popup_show() {
    element = document.getElementById('popup');
    drag_element = document.getElementById('popup_drag');
    exit_element = document.getElementById('popup_exit');
    element.style.position = "absolute";
    element.style.visibility = "visible";
    element.style.display = "block";
    element.style.left = (document.documentElement.scrollLeft + popup_mouseposX - 66) + 'px';
    element.style.top = (document.documentElement.scrollTop + popup_mouseposY - -16) + 'px';
    drag_element['target'] = 'popup';
    drag_element.onmousedown = popup_mousedown;
    exit_element.onclick = popup_exit;
}
function popup_mousepos(e) {
    var ie = navigator.appName == "Microsoft Internet Explorer";
    popup_mouseposX = ie ? window.event.clientX : e.clientX;
    popup_mouseposY = ie ? window.event.clientY : e.clientY;
}
if (navigator.appName == "Microsoft Internet Explorer")
    document.attachEvent('onmousedown', popup_mousepos);
else document.addEventListener('mousedown', popup_mousepos, false);
if (navigator.appName == "Microsoft Internet Explorer")
    document.attachEvent('onmousemove', popup_mousemove);
else document.addEventListener('mousemove', popup_mousemove, false);
if (navigator.appName == "Microsoft Internet Explorer")
    document.attachEvent('onmouseup', popup_mouseup);
else document.addEventListener('mouseup', popup_mouseup, false);