解读 M$ 源代码：JavaScript + CSS 实现动态菜单显示

作者：袖梨 2022-06-30

        更易使用
        T language="javascript">
var whichIm;
var varColor = "DDEEFF";
document.onmouseover = mouseOver;
document.onmouseout = mouseOut;
document.onmousedown = mouseDown;
document.onmouseup = mouseUp;
function mouseOver() {
    var vSrc = window.event.srcElement;
    if (vSrc.className == "child2" || vSrc.className == "child3" || vSrc.className == "parent")/*判断对象是否为“单位”*/ {
    fColor = vSrc.style.backgroundColor;
    vSrc.style.backgroundColor = varColor;
    /*注2*/
    }
}
function mouseOut() {
    var vSrc = window.event.srcElement;
    if (vSrc.className == "child2" || vSrc.className == "child3" || vSrc.className == "parent") {
    vSrc.style.backgroundColor = fColor;
    /*注2*/
    }
}
function mouseDown() {
    var vSrc = window.event.srcElement;
    divColl=document.all.tags("DIV");