复杂的定位的问题

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
<SCRIPT language=javascript>
ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 1000
ypSlideOutMenu.minCPUResolution = 10// constructor
function ypSlideOutMenu(id, dir, left, top, width, height)
{
this.ie  = document.all ? 1 : 0
this.ns4 = document.layers ? 1 : 0
this.dom = document.getElementById ? 1 : 0 if (this.ie || this.ns4 || this.dom) {
this.id = id
this.dir = dir
this.orientation = dir == "left" || dir == "right" ? "h" : "v"
this.dirType = dir == "right" || dir == "down" ? "-" : "+"
this.dim = this.orientation == "h" ? width : height
this.hideTimer = false
this.aniTimer = false
this.open = false
this.over = false
this.startTime = 0 // global reference to this object
this.gRef = "ypSlideOutMenu_"+id
eval(this.gRef+"=this") // add this menu object to an internal list of all menus
ypSlideOutMenu.Registry[id] = this var d = document
d.write('<style type="text/css">')
d.write('#' + this.id + 'Container { visibility:hidden; ')
d.write('left:' + left + 'px; ')
d.write('top:' + top + 'px; ')
d.write('overflow:hidden; }')
d.write('#' + this.id + 'Container, #' + this.id + 'Content { position:relative; ')
d.write('width:' + width + 'px; ')
d.write('height:' + height + 'px; ')
d.write('clip:rect(0 ' + width + ' ' + height + ' 0); ')
d.write('}')
d.write('</style>') this.load()
}
}ypSlideOutMenu.prototype.load = function() {
var d = document
var lyrId1 = this.id + "Container"
var lyrId2 = this.id + "Content"
var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1]
if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)
var temp if (!obj1 || !obj2) window.setTimeout(this.gRef + ".load()", 100)
else {
this.container = obj1
this.menu = obj2
this.style = this.ns4 ? this.menu : this.menu.style
this.homePos = eval("0" + this.dirType + this.dim)
this.outPos = 0
this.accelConst = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen // set event handlers.
if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')")
this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "')") //set initial state
this.endSlide()
}
}

ypSlideOutMenu.showMenu = function(id)
{
var reg = ypSlideOutMenu.Registry
var obj = ypSlideOutMenu.Registry[id]

if (obj.container) {
obj.over = true // close other menus.
for (menu in reg) if (id != menu) ypSlideOutMenu.hide(menu) // if this menu is scheduled to close, cancel it.
if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) } // if this menu is closed, open it.
if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
}
}ypSlideOutMenu.hideMenu = function(id)
{
// schedules the menu to close after <hideDelay> ms, which
// gives the user time to cancel the action if they accidentally moused out
var obj = ypSlideOutMenu.Registry[id]
if (obj.container) {
if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
}
}ypSlideOutMenu.hide = function(id)
{
var obj = ypSlideOutMenu.Registry[id]
obj.over = false if (obj.hideTimer) window.clearTimeout(obj.hideTimer)

// flag that this scheduled event has occured.
obj.hideTimer = 0 // if this menu is open, close it.
if (obj.open && !obj.aniTimer) obj.startSlide(false)
}ypSlideOutMenu.prototype.startSlide = function(open) {
this[open ? "onactivate" : "ondeactivate"]()
this.open = open
if (open) this.setVisibility(true)
this.startTime = (new Date()).getTime()
this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution)
}ypSlideOutMenu.prototype.slide = function() {
var elapsed = (new Date()).getTime() - this.startTime
if (elapsed > ypSlideOutMenu.aniLen) this.endSlide()
else {
var d = Math.round(Math.pow(ypSlideOutMenu.aniLen-elapsed, 2) * this.accelConst)
if (this.open && this.dirType == "-") d = -d
else if (this.open && this.dirType == "+") d = -d
else if (!this.open && this.dirType == "-") d = -this.dim + d
else d = this.dim + d this.moveTo(d)
}
}ypSlideOutMenu.prototype.endSlide = function() {
this.aniTimer = window.clearTimeout(this.aniTimer)
this.moveTo(this.open ? this.outPos : this.homePos)
if (!this.open) this.setVisibility(false)
if ((this.open && !this.over) || (!this.open && this.over)) {
this.startSlide(this.over)
}
}ypSlideOutMenu.prototype.setVisibility = function(bShow) {
var s = this.ns4 ? this.container : this.container.style
s.visibility = bShow ? "visible" : "hidden"
}
ypSlideOutMenu.prototype.moveTo = function(p) {
this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}
ypSlideOutMenu.prototype.getPos = function(c) {
return parseInt(this.style[c])
}// events
ypSlideOutMenu.prototype.onactivate = function() { }
ypSlideOutMenu.prototype.ondeactivate = function() { } new ypSlideOutMenu("blue", "right", 136, 5, 120, 75)
</SCRIPT>
</head><body>
<br><br><br>
<center>
<table width="100" ID="Table1">
  <tr>
    <td>
    <TABLE cellSpacing=0 cellPadding=0 width=136 border=0 class="tbfont" ID="Table3">
        <TBODY>
            <tr>
               <TD width=136 height=18 colSpan=3 align="center" bgcolor="#5382EA" onmouseover="ypSlideOutMenu.showMenu('blue');" onmouseout="ypSlideOutMenu.hideMenu('blue');">蓝色系列</TD>
             </tr>
         </TBODY>
      </table></td><td>
    <DIV id=blueContainer>
      <DIV class=menu id=blueContent>
      <TABLE cellSpacing=0 cellPadding=0 border=0 ID="Table2">
        <TBODY>
        <TR>
          <TD><A class=menu
            href="#">BLUEBIRD</A></TD></TR>
        <TR>
          <TD><A class=menu
            href="#">BLUEFISH</A></TD>
        </TR>
        </TBODY></TABLE>
      </DIV></DIV>
  <SCRIPT language=javascript>// y is the absolute y coordinate in the browser window(the first menu'coordinate)
// for some reason IE on a mac puts the zero-y coordinate
// where the include begins
var y = 5; var appName = navigator.appName.toLowerCase();
var is_ie = (appName.indexOf("microsoft")!=-1); var agt=navigator.userAgent.toLowerCase();
var is_mac = (agt.indexOf("mac")!=-1);

if(is_mac && is_ie) {
y = 5;
} else if(is_mac) {
y = 103;
}

// This is the height of one item in the leftnav PLUS any spacer between
// it and the next item
var menuItemHeight = 18;
new ypSlideOutMenu("blue", "right", 0, y, 120, 30)
</SCRIPT>
     </td>
  </tr>
</table>
<SCRIPT language=javascript>if(navigator.appName!='Netscape'&&navigator.
appVersion.toString().charAt(0)!='3')document.write("<\!--");</SCRIPT>
</center>
</body>
</html>

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复杂的定位的问题

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