鼠标使图片变化导航

下面为效果显示

脚本说明:
第一步：把如下代码加入<body>区域中
<STYLE type=text/css>.table1 {
	BORDER-RIGHT: #cccccc 1px solid; BORDER-BOTTOM-COLOR: black; BORDER-LEFT: #cccccc 1px solid; BORDER-TOP-STYLE: solid; BORDER-TOP-COLOR: black; BACKGROUND-COLOR: #666666; BORDER-BOTTOM-STYLE: solid
}
.alp {
	FILTER: Alpha(Opacity=0,FinishOpacity=0, Style=2, StartX=0, StartY=0, FinishX=80, FinishY=80); BACKGROUND-COLOR: #99ccff
}
.maskl {
	OVERFLOW: hidden
}
.submenu {
	BORDER-RIGHT: #ffffff 1px solid; BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: black 0px solid; BORDER-BOTTOM: #ffffff 1px solid
}
</STYLE>

<SCRIPT>
function subClose1(){
	if(sub2.style.pixelLeft>-26){
		sub2.style.pixelLeft--;
		setTimeout("subClose1()",1);
		}else{
		sub2.style.pixelLeft=-26;
		subMenuShowing=false;
		hideM2();
		}
}

subMenuShowing=false;
function subMenu1(){
	var obj=event.srcElement;
	subMenuShowing=true;
	sub2out();	
}

function sub2out(){
	if(sub2.style.pixelLeft<2){
		sub2.style.pixelLeft++;
		setTimeout("sub2out()",1);
		}
}

curSelect=0;
function showMenu(mID){
	var oMenu=eval("menu"+mID);
	var oCircle=eval("sl"+mID);
	oMenu.style.pixelTop+=10;
	if(oMenu.style.pixelTop<oCircle.style.pixelTop+6) {
		oMenu.timeHandle=setTimeout("showMenu("+mID+")",1);
		}
		else oMenu.style.pixelTop=oCircle.style.pixelTop+6;
}
function hideMenu(mID){
	var oMenu=eval("menu"+mID);
	var oCircle=eval("sl"+mID);
	oMenu.style.pixelTop-=10;
	if(oMenu.style.pixelTop>-60) {
		oMenu.timeHandle=setTimeout("hideMenu("+mID+")",1);
		}
		else oMenu.style.pixelTop=-80;
}

function lightMv(){
	if(light.filters.Alpha.opacity<100) {
		light.filters.Alpha.opacity+=5;
		light.timeHandle=setTimeout("lightMv()",1);
		} 	
}

function darkMv(){
	if(light.filters.Alpha.opacity>0) {
		light.filters.Alpha.opacity-=5;
		light.timeHandle=setTimeout("darkMv()",1);
		} 	
}

function init(){
	sl1.mvStep=1;
	sl1.dx=0;
	sl1.speed=50;
	sl2.mvStep=1;
	sl2.dx=0;
	sl2.speed=1;
	sl3.mvStep=1;
	sl3.dx=0;
	sl3.speed=10;
	sl4.mvStep=1;
	sl4.dx=0;
	sl4.speed=20;
	startAllMv();
}

</SCRIPT>
<DIV class=table1 id=Layer1 
style="Z-INDEX: 3; LEFT: 50px; WIDTH: 26px; POSITION: absolute; TOP: 0px; HEIGHT: 100%">
<DIV id=sl1 onmouseover=showM1() 
style="Z-INDEX: 3; WIDTH: 24px; CURSOR: hand; POSITION: absolute; TOP: 40px; HEIGHT: 24px" 
onmouseout=hideM1()><IMG height=24 src="circle2.gif" width=24></DIV>
<DIV id=sl2 onmouseover=showM2() 
style="Z-INDEX: 3; WIDTH: 24px; CURSOR: hand; POSITION: absolute; TOP: 140px; HEIGHT: 24px" 
onclick=subMenu1() onmouseout=hideM2()><IMG height=24 
src="circle2.gif" width=24></DIV>
<DIV id=sl3 onmouseover=showM3() 
style="Z-INDEX: 3; WIDTH: 24px; CURSOR: hand; POSITION: absolute; TOP: 240px; HEIGHT: 24px" 
onmouseout=hideM3()><IMG height=24 src="circle2.gif" width=24></DIV>
<DIV id=sl4 onmouseover=showM4() 
style="Z-INDEX: 3; WIDTH: 24px; CURSOR: hand; POSITION: absolute; TOP: 340px; HEIGHT: 24px" 
onmouseout=hideM4()><IMG height=24 src="circle2.gif" width=24></DIV>
<DIV class=alp id=light 
style="Z-INDEX: 2; LEFT: -26px; WIDTH: 80px; POSITION: absolute; TOP: 0px; HEIGHT: 80px"></DIV></DIV>
<DIV 
style="Z-INDEX: 2; LEFT: -60px; WIDTH: 30px; POSITION: absolute; TOP: 0px; HEIGHT: 100px">
<DIV id=menu1 
style="Z-INDEX: 5; LEFT: 82px; WIDTH: 20px; POSITION: absolute; TOP: -80px; HEIGHT: 55px"><IMG 
height=62 src="nav_r1_c1.gif" width=24></DIV>
<DIV id=menu2 
style="Z-INDEX: 5; LEFT: 82px; WIDTH: 23px; POSITION: absolute; TOP: -80px; HEIGHT: 75px"><IMG 
height=77 src="nav_r3_c3.gif" width=24></DIV>
<DIV id=menu3 
style="Z-INDEX: 5; LEFT: 82px; WIDTH: 22px; POSITION: absolute; TOP: -80px; HEIGHT: 75px"><IMG 
height=77 src="nav_r5_c5.gif" width=24></DIV>
<DIV id=menu4 
style="Z-INDEX: 5; LEFT: 82px; WIDTH: 23px; POSITION: absolute; TOP: -80px; HEIGHT: 77px"><IMG 
height=77 src="nav_r7_c7.gif" width=24></DIV></DIV>
<DIV class=maskl id=masksub 
style="Z-INDEX: 4; LEFT: 80px; WIDTH: 32px; POSITION: absolute; TOP: 0px; HEIGHT: 100%">
<DIV id=sub2 
style="Z-INDEX: 1; LEFT: -26px; WIDTH: 26px; POSITION: absolute; TOP: 137px; HEIGHT: 304px">
<TABLE class=submenu height="100%" cellSpacing=2 cellPadding=0 width="100%" 
border=0>
  <TBODY>
  <TR>
    <TD bgColor=#666699> </TD></TR>
  <TR>
    <TD bgColor=#666699> </TD></TR>
  <TR>
    <TD bgColor=#666699> </TD></TR>
  <TR>
    <TD bgColor=#666699 height=147> </TD></TR>
  <TR>
    <TD onmouseover="this.bgColor='#9999cc'" onmouseout="this.bgColor='#666699'" 
    bgColor=#666699 height=10>
      <DIV style="CURSOR: hand" onclick=subClose1() align=center><B><FONT 
      color=#ffff00>B</FONT></B></DIV></TD></TR></TBODY></TABLE></DIV></DIV>

第二步：把<body>中的内容改为：
<body   onload=init()>