滾動條事件
滾動計數+樓層顯示
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
body{
margin: 0;
padding: 0;
}
.cont{
height: 10000px;
}
#top{
position: fixed;
width: 100%;
height: 50px;
top: 0px;
left: 0px;
background-color: pink;
display: none;
}
#left{
position: fixed;
top: 150px;
left: 20px;
height: 500px;
width: 50px;
background-color: green;
display: none;
}
#left ul{
list-style: none;
padding-left: 0px;
}
#left ul li{
border: 1px solid gray;
margin: 15px auto;
height: 30px;
line-height: 30px;
text-align: center;
}
.a{
border: 1px solid #FFFFFF;
color: #FFFFFF;
}
</style>
<script>
// var a = 0;
//滾動事件
function myScroll(){
// a++;
var i = document.body.scrollTop;
var top = document.getElementById("top");
var left = document.getElementById("left");
var f1 = document.getElementById("f1");
var f2 = document.getElementById("f2");
var f3 = document.getElementById("f3");
var f4 = document.getElementById("f4");
var f5 = document.getElementById("f5");
//控制頂部
if(i >= 1000){
top.style.display = "block";
top.innerHTML = i;
}else{
top.style.display = "none";
}
//控制左側
if(i >= 2000){
left.style.display = "block";
}else{
left.style.display = "none";
}
//顯示樓層
if(i >= 2000 && i<=2500){
f1.className = "a";
f2.className = "";
f3.className = "";
f4.className = "";
f5.className = "";
}else if(i>2500 && i<=3000){
f1.className = "";
f2.className = "a";
f3.className = "";
f4.className = "";
f5.className = "";
}else if(i>3000 && i<=3500){
f1.className = "";
f2.className = "";
f3.className = "a";
f4.className = "";
f5.className = "";
}else if(i>3500 && i<=4000){
f1.className = "";
f2.className = "";
f3.className = "";
f4.className = "a";
f5.className = "";
}else if(i>4000 && i<=4500){
f1.className = "";
f2.className = "";
f3.className = "";
f4.className = "";
f5.className = "a";
}
}
</script>
</head>
<body onscroll="myScroll()">
<div id="left">
<ul>
<li id="f1">1F</li>
<li id="f2">2F</li>
<li id="f3">3F</li>
<li id="f4">4F</li>
<li id="f5">5F</li>
</ul>
</div>
<div id="top"></div>
<div class="cont"></div>
</body>
</html>