要完成此效果需要三個(gè)步驟
第一步：把如下代碼加入到區(qū)域中
<script language="javascript">
function menuIn() //菜單隱藏
{
if(n4) {
clearTimeout(out_ID)
if( menu.top > menuH*-1+20+10 ) {
menu.top -= 8
in_ID = setTimeout("menuIn()", 1)
}
else if( menu.top > menuH*-1+20 ) {
menu.top--
in_ID = setTimeout("menuIn()", 1)
}
}
else {
clearTimeout(out_ID)
if( menu.pixelTop > menuH*-1+20+10 ) {
menu.pixelTop -= 8
in_ID = setTimeout("menuIn()", 1)
}
else if( menu.pixelTop > menuH*-1+20 ) {
menu.pixelTop--
in_ID = setTimeout("menuIn()", 1)
}
}
}
function menuOut() //菜單顯示
{
if(n4) {
clearTimeout(in_ID)
if( menu.top < -10) {
menu.top += 4
out_ID = setTimeout("menuOut()", 1)
}
else if( menu.top < 0) {
menu.top++
out_ID = setTimeout("menuOut()", 1)
}
}
else {
clearTimeout(in_ID)
if( menu.pixelTop < -10) {
menu.pixelTop += 2
out_ID = setTimeout("menuOut()", 1)
}
else if( menu.pixelTop < 0 ) {
menu.pixelTop++
out_ID = setTimeout("menuOut()", 1)
}
}
}
function fireOver() {
clearTimeout(F_out)
F_over = setTimeout("menuOut()", 10)
}
function fireOut() {
clearTimeout(F_over)
F_out = setTimeout("menuIn()", 10)
}
function init() {
if(n4) {
menu = document.D1
menuH = menu.document.height
menu.top = menu.document.height*-1+20
menu.onmouseover = menuOut
menu.onmouseout = menuIn
menu.visibility = "visible"
}
else if(e4) {
menu = D1.style
menuH = D1.offsetHeight
D1.style.pixelTop = D1.offsetHeight*-1+20
D1.onmouseover = fireOver
D1.onmouseout = fireOut
D1.style.visibility = "visible"
}
}
F_over=F_out=in_ID=out_ID=null
n4 = (document.layers)?1:0
e4 = (document.all)?1:0;
</script>
第二步：把如下代碼加入到區(qū)域中
第三步：把“onload="init()"”加在標(biāo)記里
例如：
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