① js怎么实现点击文本框出现下拉菜单,并且有补充的功能。
不是点击事件 是键盘每输入一个字母触发一次(onkeyup触发事件)先设置一个隐藏框<div></div>(div的css样式版display设为none)设置权宽高 定好位置 每次触发更改div的display为块儿(block)
document.getElementById(“div的id”).style.display="block" 同时获取文本框值document.getElementById(“input的id”).value赋给一个变量 用ajax后台连接数据库显示出(echo)和你输入的字符匹配的数据 放到一个表格里 把返回的http.responseText写入到div框中document.getElementById(“div的id”).innerHTML=http.responseText
② 用js如何实现模糊查询带下拉菜单
js模糊查询 定位select 下拉框
//功能:快速定位select中内容的方法
//描述:当txt中的内容变化时,下拉框的内容跟着定位。比如当在input中录入a时,select中定位到第一个有a开头的元素。
// 该方法是为选择炉号、选择钢号、选择生产号三个select元素用的。
//参数:selectName是select元素的名字,inputText是input中已经录入了的内容。
function txtOnChange(selectName,inputText){
if (selectName.selectedIndex!=-1){
selectName.options(selectName.selectedIndex).selected = false;
}
/*当selectName长度不固定时,短selectName的定位*/
for (i=0;i<selectName.options.length;i++){
if (selectName.options(i).text == inputText){
selectName.options(i).selected = true;
return;
}
}
for (i=0;i<selectName.options.length;i++){
if (selectName.options(i).text.indexOf(inputText)!=-1){
selectName.options(i).selected = true;
return;
}
}
}
//功能:当text得到焦点时,清空内容
//描述:同上
//参数:oText,触发该函数的text元素。
function txtOnfocus(oText){
oText.value="";
}
文本框使用 onkeyup事件
③ 如何在HTML里面实现鼠标划上去导航出现下拉菜单呢或者说用js插件如何调用
这个用jQuery就的toggle函数可以实现。
<!DOCTYPEhtml>
<htmllang="en">
<head>
<metacharset="UTF-8">
<title>Title</title>
<scriptsrc="
>
<style>
.main
{
list-style:none;
float:left;
margin-left:20px;
}
.mainli
{
list-style:none;
text-align:left;
margin-left:-40px;
}
.mainul
{
display:none;
}
.maina
{
text-decoration:none;
}
.mainlia
{
text-decoration:none;
}
</style>
</head>
<body>
<ulid="uid">
<liclass="main"><ahref="#">菜单一</a>
<ul>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
</ul>
</li>
<liclass="main"><ahref="#">菜单二</a>
<ul>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
</ul>
</li>
<liclass="main"><ahref="#">菜单三</a>
<ul>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
<li><ahref="#">子菜单</a></li>
</ul>
</li>
</ul>
</body>
<script>
$(document).ready(
function(){
$(".main").hover(function(){
$(this).children("ul").toggle();
})
}
)
</script>
</html>
④ 如何用css或js设置如下图的样式,当点击的时候出现下拉菜单,显示里面的内容。
HTML:
<p class="p">基础</p>
<div class="show">
<ul>
<li><a href="#">aa</a></li>
<li><a href="#">ss</a></li>
<li><a href="#">dd</a></li>
<li><a href="#">ff</a></li>
<li><a href="#">gg</a></li>
</ul>
</div>
css:
.show{
display:none;
}
js:
var isClick=true;
$(".p").click(function(){
if(isClick){
$(".show").css("display","block");
isClick=false;
}else{
$(".show").css("display","none");
isClick=true;
}
})
思路,
要显示的内容用一个div包住,当你点击基础的时候回,div显示,再点击时答div隐藏
⑤ 网页制作 html,js搜索中的下拉菜单是怎么出来的
将一个DIV的position样式设置为absolute, display样式设置为none;
文本框的onpropertychange事件中使用专JS将DIV的display样式设置为block
DIV数据通过Ajax填充属.
document对象的onclick事件中使用JS将DIV的display样式设置为none
简单说这就是实现原理.
⑥ js在火狐浏览器下的兼容性问题,这个JS下拉导航菜单在火狐浏览器下不起作用,谁能帮我调一下这个js呢
讨厌修改。给你一个自己看吧,兼容IE678,火狐,谷歌,苹果,
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>二级dropdown弹出菜单--A CROSS BROWSER DROP DOWN CASCADING VALIDATING MENU</title>
<style type="text/css">
/* common styling */
/* set up the overall width of the menu div, the font and the margins */
.menu {
font-family: arial, sans-serif;
width:750px;
margin:0;
margin:50px 0;
}
/* remove the bullets and set the margin and padding to zero for the unordered list */
.menu ul {
padding:0;
margin:0;
list-style-type: none;
}
/* float the list so that the items are in a line and their position relative so that the drop down list will appear in the right place underneath each list item */
.menu ul li {
float:left;
position:relative;
}
/* style the links to be 104px wide by 30px high with a top and right border 1px solid white. Set the background color and the font size. */
.menu ul li a, .menu ul li a:visited {
display:block;
text-align:center;
text-decoration:none;
width:104px;
height:30px;
color:#000;
border:1px solid #fff;
border-width:1px 1px 0 0;
background:#c9c9a7;
line-height:30px;
font-size:11px;
}
/* make the dropdown ul invisible */
.menu ul li ul {
display: none;
}
/* specific to non IE browsers */
/* set the background and foreground color of the main menu li on hover */
.menu ul li:hover a {
color:#fff;
background:#b3ab79;
}
/* make the sub menu ul visible and position it beneath the main menu list item */
.menu ul li:hover ul {
display:block;
position:absolute;
top:31px;
left:0;
width:105px;
}
/* style the background and foreground color of the submenu links */
.menu ul li:hover ul li a {
display:block;
background:#faeec7;
color:#000;
}
/* style the background and forground colors of the links on hover */
.menu ul li:hover ul li a:hover {
background:#dfc184;
color:#000;
}
</style>
<!--[if lte IE 6]>
<style type="text/css">
/* styling specific to Internet Explorer IE5.5 and IE6. Yet to see if IE7 handles li:hover */
/* Get rid of any default table style */
table {
border-collapse:collapse;
margin:0;
padding:0;
}
/* ignore the link used by 'other browsers' */
.menu ul li a.hide, .menu ul li a:visited.hide {
display:none;
}
/* set the background and foreground color of the main menu link on hover */
.menu ul li a:hover {
color:#fff;
background:#b3ab79;
}
/* make the sub menu ul visible and position it beneath the main menu list item */
.menu ul li a:hover ul {
display:block;
position:absolute;
top:32px;
left:0;
width:105px;
}
/* style the background and foreground color of the submenu links */
.menu ul li a:hover ul li a {
background:#faeec7;
color:#000;
}
/* style the background and forground colors of the links on hover */
.menu ul li a:hover ul li a:hover {
background:#dfc184;
color:#000;
}
</style>
<![endif]-->
</head>
<body>
<div class="menu">
<ul>
<li><a class="hide" href="../menu/index.html">DEMOS</a>
<!--[if lte IE 6]>
<a href="../menu/index.html">DEMOS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../menu/zero_dollars.html" title="The zero dollar ads page">zero dollars</a></li>
<li><a href="../menu/embed.html" title="Wrapping text around images">wrapping text</a></li>
<li><a href="../menu/form.html" title="Styling forms">styled form</a></li>
<li><a href="../menu/nodots.html" title="Removing active/focus borders">active focus</a></li>
<li><a href="../menu/shadow_boxing.html" title="Multi-position drop shadow">shadow boxing</a></li>
<li><a href="../menu/old_master.html" title="Image Map for detailed information">image map</a></li>
<li><a href="../menu/bodies.html" title="fun with background images">fun backgrounds</a></li>
<li><a href="../menu/fade_scroll.html" title="fade-out scrolling">fade scrolling</a></li>
<li><a href="../menu/em_images.html" title="em size images compared">em sized images</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="index.html">MENUS</a>
<!--[if lte IE 6]>
<a href="index.html">MENUS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="spies.html" title="a coded list of spies">spies menu</a></li>
<li><a href="vertical.html" title="a horizontal vertical menu">vertical menu</a></li>
<li><a href="expand.html" title="an enlarging unordered list">enlarging list</a></li>
<li><a href="enlarge.html" title="an unordered list with link images">link images</a></li>
<li><a href="cross.html" title="non-rectangular links">non-rectangular</a></li>
<li><a href="jigsaw.html" title="jigsaw links">jigsaw links</a></li>
<li><a href="circles.html" title="circular links">circular links</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../layouts/index.html">LAYOUTS</a>
<!--[if lte IE 6]>
<a href="../layouts/index.html">LAYOUTS
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../layouts/bodyfix.html" title="Cross browser fixed layout">Fixed 1</a></li>
<li><a href="../layouts/body2.html" title="Cross browser fixed layout">Fixed 2</a></li>
<li><a href="../layouts/body4.html" title="Cross browser fixed layout">Fixed 3</a></li>
<li><a href="../layouts/body5.html" title="Cross browser fixed layout">Fixed 4</a></li>
<li><a href="../layouts/minimum.html" title="A simple minimum width layout">minimum width</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../boxes/index.html">BOXES</a>
<!--[if lte IE 6]>
<a href="../boxes/index.html">BOXES
<table><tr><td>
<![endif]-->
<ul>
<li><a href="spies.html" title="a coded list of spies">spies menu</a></li>
<li><a href="vertical.html" title="a horizontal vertical menu">vertical menu</a></li>
<li><a href="expand.html" title="an enlarging unordered list">enlarging list</a></li>
<li><a href="enlarge.html" title="an unordered list with link images">link images</a></li>
<li><a href="cross.html" title="non-rectangular links">non-rectangular</a></li>
<li><a href="jigsaw.html" title="jigsaw links">jigsaw links</a></li>
<li><a href="circles.html" title="circular links">circular links</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../mozilla/index.html">MOZILLA</a>
<!--[if lte IE 6]>
<a href="../mozilla/index.html">MOZILLA
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../mozilla/dropdown.html" title="A drop down menu">drop down menu</a></li>
<li><a href="../mozilla/cascade.html" title="A cascading menu">cascading menu</a></li>
<li><a href="../mozilla/content.html" title="Using content:">content:</a></li>
<li><a href="../mozilla/moxbox.html" title=":hover applied to a div">mozzie box</a></li>
<li><a href="../mozilla/rainbow.html" title="I can build a rainbow">rainbow box</a></li>
<li><a href="../mozilla/snooker.html" title="Snooker cue">snooker cue</a></li>
<li><a href="../mozilla/target.html" title="Target Practise">target practise</a></li>
<li><a href="../mozilla/splittext.html" title="Two tone headings">two tone headings</a></li>
<li><a href="../mozilla/shadow_text.html" title="Shadow text">shadow text</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../ie/index.html">EXPLORER</a>
<!--[if lte IE 6]>
<a href="../ie/index.html">EXPLORER
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../ie/exampleone.html" title="Example one">example one</a></li>
<li><a href="../ie/weft.html" title="Weft fonts">weft fonts</a></li>
<li><a href="../ie/exampletwo.html" title="Vertical align">vertical align</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
<li><a class="hide" href="../opacity/index.html">OPACITY</a>
<!--[if lte IE 6]>
<a href="../opacity/index.html">OPACITY
<table><tr><td>
<![endif]-->
<ul>
<li><a href="../opacity/colours.html" title="colour wheel">opaque colours</a></li>
<li><a href="../opacity/picturemenu.html" title="a menu using opacity">opaque menu</a></li>
<li><a href="../opacity/png.html" title="partial opacity">partial opacity</a></li>
<li><a href="../opacity/png2.html" title="partial opacity II">partial opacity II</a></li>
</ul>
<!--[if lte IE 6]>
</td></tr></table>
</a>
<![endif]-->
</li>
</ul>
<!-- clear the floats if required -->
<div class="clear"> </div>
</div>
</body>
</html>
⑦ js如何再添加一个下拉菜单呢html
除了html代码<a></a>没有关闭你的逻辑有点乱
htm导航栏是
<li><ahref=""></a></li><!--a标签要关闭-->
<li><ahref="></a></li><!--a标签要关闭-->
<li>
<ahref="></a><!--a标签要关闭-->
<divclass="nav-list"id="dataTd"style="display:none;">
<ahref=“">人物角色</a>
<ahref="">游戏视频</a>
</div>
</li>
html文件中有id为dataTd但是没有dataTh
js是
<scripttype="text/javascript">
varoDiv1=document.getElementById('dataTh');
//获取ID为dataTh的html元素
varoDiv2=document.getElementById('dataTd');
//获取ID为dataTd的html元素
vartimer=null;
//onmouseover代表鼠标划入指定范围触发事件
oDiv2.onmouseover=oDiv1.onmouseover=function()
{
clearTimeout(timer);
oDiv2.style.display='block';
oDiv1.className='data-list';
这几句代码的意思是当鼠标指向id为dataTh或者id为dataTd的元素,触发id为dataTd的元素显示,id为dataTh的元素添加类名为“data-list”的class类
};
//onmouseout代表鼠标离开指定范围触发事件
oDiv2.onmouseout=oDiv1.onmouseout=function()
{
timer=setTimeout(function(){
oDiv2.style.display='none';id为dataTd的元素隐藏
oDiv1.className='';id为dataTh的元素去掉类名为“data-list”的class类
},100);
每0.1秒执行一次
};
</script>
我给你举个例子
要实现的功能是当鼠标划过列表中的id="dataTh"的元素时,隐藏的子菜单显示
html页面
<li>
<ahref="id="dataTh"></a>
<!--子菜单以下处于隐藏状态-->
<divclass="nav-list"id="dataTd"style="display:none;">
<ahref=“">人物角色</a>
<ahref="">游戏视频</a>
</div>
<!--子菜单以上处于隐藏状态-->
</li>
JS
<scripttype="text/javascript">
varoDiv1=document.getElementById('dataTh');
//获取ID为dataTh的html元素
varoDiv2=document.getElementById('dataTd');
//获取ID为dataTd的html元素
vartimer=null;
//onmouseover代表鼠标划入指定范围触发事件
oDiv1.onmouseover=function()
{
clearTimeout(timer);
oDiv2.style.display='block';
oDiv1.className='data-list';
//这几句代码的意思是当鼠标指向id为dataTh的元素,触发id为dataTd的元素显示,id为dataTh的元素添加类名为“data-list”的class类
};
//onmouseout代表鼠标离开指定范围触发事件
oDiv1.onmouseout=function()
{
oDiv2.style.display='none';//id为dataTd的元素隐藏
oDiv1.className='';//id为dataTh的元素去掉类名为“data-list”的class类
};
</script>