javascript

CHAPTER 10 ■ SCRIPTING BOM
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sprites[e.srcElement.id || e.srcElement.className][1];
} else {
e.srcElement.style.backgroundPosition =
sprites[e.srcElement.id || e.srcElement.className][0];
}
};
} ;
var drag = function (e) {
if (!e) e = window.event;
if (!e.target) e.target = e.srcElement;
var wrapper = e.target.parentNode;
var left = parseInt(queryCascade(wrapper, "left"));
var top = parseInt(queryCascade(wrapper, "top"));
var clientX = e.clientX;
var clientY = e.clientY;
wrapper.style.zIndex = doZ();
var move = function (e) {
if (!e) e = window.event;
wrapper.style.left = left + e.clientX - clientX + "px";
wrapper.style.top = top + e.clientY - clientY + "px";
burst(e);
};
var drop = function (e) {
if (!e) e = window.event;
removeListener(document, "mousemove", move, true);
removeListener(document, "mouseup", drop, true);
if (parseInt(wrapper.style.left) < 0) wrapper.style.left = "0px";
if (parseInt(wrapper.style.top) < 0) wrapper.style.top = "0px";
burst(e);
thwart(e);
};
addListener(document, "mousemove", move, true);
addListener(document, "mouseup", drop, true);
burst(e);
thwart(e);
};
var prepDrag = function () {
var elements = findClass("drag");
for (var i = elements.length; i --; ) {
addListener(elements[i], "mousedown", drag);
}
};
var presetSkin = function () {
var pref = getCookie("skin");
if (pref !== false) {
document.getElementById("skin").href = pref + ".css";
}
};
var prepSkinKeys = function () {
var sheet = document.getElementById("skin");