在很多网站都有看到下拉框的功能，让我们一起来看看html如何制作下拉框。
01新建一个html文件。如图
02在html页面找打body标签，在这个标签里新建select标签，在select标签内创建option标签并设置内容。如图
代码：
<select>
<option>-请选择-</option>
<option>1111111</option>
<option>2222222</option>
<option>3333333</option>
</select>
03保存好html文件后使用浏览器打开，即可看到效果。如图：
04所有代码。可直接把所有代码复制到html文件上运行即可看到效果。如图：
所有代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>下拉选择框</title>
</head>
<body>
<select>
<option>-请选择-</option>
<option>1111111</option>
<option>2222222</option>
<option>3333333</option>
</select>
</body>
</html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
select {width: 75pxfont-size: 20pxcolor:#000000font-family: '宋体'}
#main {width: 400pxheight: 20pxmargin:0 autoword-spacing: 0px}
#main select { color:green}
#main select[name=S1] { color:orange}
</style>
</head>
<body>
<div id="main"></div>
<script>
initSelects()
function initSelects() {
var data = {
10:[
[12,110,190,'ESA1210'],
[16,150,230,'ESA1610'],
[20,190,270,'ESA2010']
],
20: [
[24,230,310,'ESA2410'],
[28,270,350,'ESA2810'],
[32,310,390,'ESA3210'],
[36,350,430,'ESA3610']
],
40: [
[40,390,470,'ESA4010'],
[44,430,510,'ESA4410'],
[48,470,550,'ESA4810'],
[52,510,590,'ESA5210']
]
}
var selectNames = ['S1', 'S2', 'S3', 'S4', 'S5']
var sunits = ['mm', 'n', 'mm', 'mm', '']
var main = document.getElementById('main')
var S1 = document.createElement('select')
S1.name = selectNames[0]
S1.onchange = function() {
for(var i = 0i <SG2s.lengthi++)
SG2s[i].options.length = 0
data[this.value].forEach(function(line) {
for(var i = 0i <SG2s.lengthi++) {
var atom = line[i]
SG2s[i].options.add( new Option(atom + sunits[i], atom) )
}
})
}
for(var y in data)
S1.options.add(new Option(y + select[0], y))
main.append(S1)
var SG2s = []
var names
for(var i = 0i <4i++) {
var s = document.createElement('select')
s.name = selectNames[i + 1]
s.onchange = function() {
for(var i = 0i <SG2s.lengthi++)
SG2s[i].selectedIndex = this.selectedIndex
}
SG2s.push(s)
main.append(s)
}
S1.onchange()
}
</script>
</body>
</html>
按说这种 *** 作应该是后台程序来做，前端 *** 作的话有点窒息，主要是数据量。。亲测有效，望采纳！
<!doctype html><html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<link rel="stylesheet" type="text/css" href="CSS3/xuanxing.css" />
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.js"></script>
</head>
<body>
<style>
select{ width:75px font-size:12px color:#000000 font-family:'宋体' margin:auto 0px}
#select0{ background:yellow}
.select{ background:#85e785}
</style>
<script>
$(document).ready(function(e) {
$("select#select0").change(function(){
var cc = $(this).find("option:selected").attr("class")
$(this).siblings("select").find("option").hide()
$(this).siblings("select").find("option."+cc).show()
$(this).siblings("select").find("option."+cc+":first").attr("selected","selected")
})
$("select.select").change(function(){
var cid = $(this).find("option:selected").index()
$(this).siblings("select.select").each(function(){
$(this).find("option").eq(cid).attr("selected","selected")
})
})
})
</script>
<div style="width: 400px height: 20px margin:0 auto word-spacing: 0px">
<select id="select0">
<option class="op0">10mm</option>
<option class="op1">20mm</option>
<option class="op2">40mm</option>
</select>
<select class="select">
<option class="op0">8n</option>
<option class="op0">12n</option>
<option class="op0">16n</option>
<option class="op1">24n</option>
<option class="op1">28n</option>
<option class="op1">32n</option>
<option class="op2">40n</option>
<option class="op2">44n</option>
</select>
<select class="select">
<option class="op0">70mm</option>
<option class="op0">110mm</option>
<option class="op0">150mm</option>
<option class="op1">230mm</option>
<option class="op1">270mm</option>
<option class="op1">310mm</option>
<option class="op2">390mm</option>
<option class="op2">430mm</option>
</select>
<select class="select">
<option class="op0">128mm</option>
<option class="op0">190mm</option>
<option class="op0">230mm</option>
<option class="op1">310mm</option>
<option class="op1">350mm</option>
<option class="op1">390mm</option>
<option class="op2">470mm</option>
<option class="op2">510mm</option>
</select>
<select class="select">
<option class="op0">ESA0810</option>
<option class="op0">ESA1210</option>
<option class="op0">ESA1610</option>
<option class="op1">ESA2410</option>
<option class="op1">ESA2810</option>
<option class="op1">ESA3210</option>
<option class="op2">ESA4010</option>
<option class="op2">ESA4410</option>
</select>
</div>
</body>
</html>
<!---->
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）