一个用javascript写的select支持上下键、首字母筛选以及回车取值的功能


Posted in Javascript onSeptember 09, 2009

调用时可以这样:

1,tempStr=GetNewSelectStr(dataTable.value,"select"+rowIndex,true);
2,makeSelectBox("select"+rowIndex,tempStr,value,obj);

tempStr-这个是返回的下拉列表值的框体
dataTable.value-这个是数据源(我这里是一张表)
"select"+rowIndex-这个是ID号,也就是当前这个select的id号(我这里是有多个select所以ID号是自动的)
true-这个是控制单击时出现下拉框体的标识
value-这个是初始的时候显示在select输入框中的值
obj-这个是要显示select的对象

源代码:
<script type="text/javascript">
var tempStr=GetNewSelectStr(dataTable.value,"select"+rowIndex,true);
makeSelectBox("select"+rowIndex,tempStr,value,obj);
var nowOpenedSelectBox = "";
var mousePosition = "";
var userList=null;
function selectThisValue(thisId,thisIndex,thisValue,thisString) {
var objId = thisId;
var nowIndex = thisIndex;
var valueString = thisString;
var sourceObj = $(objId);
var nowSelectedValue = document.getElementById(nowIndex+thisId).innerHTML;
hideOptionLayer(objId);
if (sourceObj) sourceObj.value = nowSelectedValue;
settingValue(objId,valueString);
selectBoxFocus(objId);
if (sourceObj.onchange) sourceObj.onchange();
}

function settingValue(thisId,thisString) {
var objId = thisId;
var valueString = thisString;
var selectedArea = document.getElementById(objId+"selectBoxSelectedValue");
if (selectedArea) {
if(navigator.appName.indexOf("Explorer") > -1){
selectedArea.innerText = valueString;
}
else{
selectedArea.textContent = valueString;
}
}
}

var l=0;
//显示下拉框中的值
function viewOptionLayer(thisId,Istask,flag) {
var objId = thisId;
var selectInfo="";
var optionHeight = 18; // 高
var optionMaxNum = 7; //
var optionInnerLayerHeight = "";
var selectBoxWidth =130;
var selectBoxHeight =17;
l=userList.Rows.length;
var optionLayer = document.getElementById(objId+"selectBoxs");
if(optionLayer.innerHTML=="")
{
if (l > optionMaxNum) optionInnerLayerHeight = "height:"+ (optionHeight * optionMaxNum) + "px";
selectInfo = "<table class='selectTable' id='" + objId + "selectBoxOptionLayer' cellpadding='0' cellspacing='0' border='0' style='position:absolute;z-index:100;'>";
if(Istask=="true")
{
selectInfo += " <tr>";
selectInfo += " <td height='" + selectBoxHeight + "' style='cursor:hand;' onClick=\"hideOptionLayer('"+ objId + "')\"></td>";
selectInfo += " </tr>";
selectInfo += " <tr>";
selectInfo += " <td style='height:2px;overflow:hidden;'></td>";
selectInfo += " </tr>";
}
else
{
selectInfo += " <tr style='height:24px;'>";
selectInfo += " <td height='" + selectBoxHeight + "' style='cursor:hand;' onClick=\"hideOptionLayer('"+ objId + "')\"></td>";
selectInfo += " </tr>";
}
selectInfo += " <tr style='height:17px;line-height:17px;border:none;'>";
selectInfo += " <td>";
selectInfo += " <div id='"+objId+"viewOptions' class='selectBoxOptionInnerLayer' style='width:" + selectBoxWidth + "px;" + optionInnerLayerHeight + "'>";
selectInfo += " <table class='selectTable' cellpadding='0' cellspacing='0' border='0' width='98%'>";
for (var i=0 ; i < l ; i++)
{
var nowValue = userList.Rows[i][userList.Columns[0].Name];
var nowText = userList.Rows[i][userList.Columns[0].Name];
if(Istask=="true")
{
selectInfo += " <tr>";
}
else
{
selectInfo += " <tr style='height:17px;line-height:17px; border:none;'>";
}
selectInfo += " <td id='"+i+objId+"' onMouseOver=\"resetStyle('"+objId+"');this.style.backgroundColor='#2c59aa';this.style.color='#ffffff';return true;\" onMouseOut=\"this.style.backgroundColor='#FFFFFF';this.style.color='#253449';return true;\" height='" + optionHeight + "' class='selectBoxOption' onMouseOver=\"this.className='selectBoxOptionOver'\" onMouseOut=\"this.className='selectBoxOption'\" onClick=\"selectThisValue('"+ objId + "'," + i + ",'" + nowValue + "','" + nowText + "')\" style='cursor:hand;'>" + nowText + "</td>";
// selectInfo += " <input type='hidden' id='"+ objId + "SelectBoxOptionValue" + i + "' value='" + nowValue + "'/>";
selectInfo += " </tr>";
}
selectInfo += " </table>";
selectInfo += " </div>";
selectInfo += " </td>";
selectInfo += " </tr>";
selectInfo += "</table>";
optionLayer.innerHTML=selectInfo;
}
if (flag && optionLayer.style.display=="none"){ optionLayer.style.display = "";optionLayer.focus();}
else
{
optionLayer.style.display = "none";
if(document.getElementById("level"))
{
document.getElementById("level").style.display="";
}
if(document.getElementById("priority"))
{
document.getElementById("priority").style.display="";
}
}
if(!flag){optionLayer.style.display = "";optionLayer.focus();}
for(var i=0;i<count;i++)
{
if(document.getElementById("select"+i+""+"viewOptions"))
{
document.getElementById("select"+i+""+"viewOptions").style.display="none";
}
}
document.getElementById(objId+"viewOptions").style.display="";
if(document.getElementById("level"))
{
document.getElementById("level").style.display="none";
}
if(document.getElementById("priority"))
{
document.getElementById("priority").style.display="none";
}
nowOpenedSelectBox = objId;
setMousePosition("inBox");
}
//支持首字母筛选、回车键取值、上下键选值功能
function firstLetter(thisId){
var count=0;
var selectedVal="";
if(document.getElementById(thisId+"viewOptions").style.display=="")
{
document.getElementById(thisId+"viewOptions").focus();
var asciiCode=String.fromCharCode(event.keyCode).toLowerCase();
var selectValue="";
if(event.keyCode==38)
{
for(var i=0;i<l;i++)
{
if(document.getElementById(i+thisId).className=="selectBoxOptionOver" && i>0)
{
document.getElementById(i+thisId).style.backgroundColor='#ffffff';
document.getElementById(i+thisId).style.color='#253449';
document.getElementById(i+thisId).className='selectBoxOption';
document.getElementById((i-1)+thisId).style.backgroundColor='#2c59aa';
document.getElementById((i-1)+thisId).style.color='#ffffff';
document.getElementById((i-1)+thisId).className='selectBoxOptionOver';
document.getElementById(thisId+"viewOptions").scrollTop= (i-1)*20;
count=1;
break;
}
}
if(count==0)
{
document.getElementById((l-1)+thisId).style.backgroundColor='#2c59aa';
document.getElementById((l-1)+thisId).style.color='#ffffff';
document.getElementById((l-1)+thisId).className='selectBoxOptionOver';
}
}
if(event.keyCode==40)
{
for(var i=0;i<l;i++)
{
if(document.getElementById(i+thisId).className=="selectBoxOptionOver" && i<l-1)
{
document.getElementById(i+thisId).style.backgroundColor='#ffffff';
document.getElementById(i+thisId).style.color='#253449';
document.getElementById(i+thisId).className='selectBoxOption';
document.getElementById((i+1)+thisId).style.backgroundColor='#2c59aa';
document.getElementById((i+1)+thisId).style.color='#ffffff';
document.getElementById((i+1)+thisId).className='selectBoxOptionOver';
if(i>10)
{
document.getElementById(thisId+"viewOptions").scrollTop= (i+1)*19;
}
else
{
document.getElementById(thisId+"viewOptions").scrollTop= (i+1)*10;
}
count=1;
break;
}
}
if(count==0)
{
document.getElementById(0+thisId).style.backgroundColor='#2c59aa';
document.getElementById(0+thisId).style.color='#ffffff';
document.getElementById(0+thisId).className='selectBoxOptionOver';
}
}
if(event.keyCode==13)
{
for(var i=0;i<l;i++)
{
if(document.getElementById(i+thisId).className=="selectBoxOptionOver")
{
selectedVal=document.getElementById(i+thisId).innerHTML;
var sourceObj = $(thisId);
hideOptionLayer(thisId);
if (sourceObj) sourceObj.value = selectedVal;
settingValue(thisId,selectedVal);
selectBoxFocus(thisId);
if (sourceObj.onchange) sourceObj.onchange();
document.getElementById(thisId+"viewOptions").style.display="none";
if(document.getElementById("level"))
{
document.getElementById("level").style.display="";
}
if(document.getElementById("priority"))
{
document.getElementById("priority").style.display="";
}
break;
}
}
}
for(var i=0 ; i < l ; i++)
{
selectValue=document.getElementById(i+thisId).innerHTML;
if(asciiCode==selectValue.substring(0,1))
{
resetStyle(thisId);
document.getElementById(i+thisId).style.backgroundColor='#2c59aa';
document.getElementById(i+thisId).style.color='#ffffff';
document.getElementById(i+thisId).className='selectBoxOptionOver';
document.getElementById(thisId+"viewOptions").scrollTop= i*19;
break;
}
}
}
}
//清除被选中的下拉列表值的样式
function resetStyle(thisId){
for(var i=0;i<l;i++)
{
document.getElementById(i+thisId).style.backgroundColor='#ffffff';
document.getElementById(i+thisId).style.color='#253449';
document.getElementById(i+thisId).className='selectBoxOption';
}
}
//隐藏下拉框
function hideOptionLayer(thisId) {
var objId = thisId;
var optionLayer = document.getElementById(objId+"selectBoxs");
if (optionLayer) optionLayer.style.display = "none";
if(document.getElementById("level"))
{
document.getElementById("level").style.display="";
}
if(document.getElementById("priority"))
{
document.getElementById("priority").style.display="";
}
}

function setMousePosition(thisValue) {
var positionValue = thisValue;
mousePosition = positionValue;
}

function clickMouse() {
if (mousePosition == "out") hideOptionLayer(nowOpenedSelectBox);
}

function selectBoxFocus(thisId) {
var objId = thisId;
var obj = document.getElementById(objId + "selectBoxSelectedValue");
obj.className = "selectBoxSelectedAreaFocus";
obj.focus();
}

function selectBoxBlur(thisId) {
var objId = thisId;
var obj = document.getElementById(objId + "selectBoxSelectedValue");
obj.className = "selectBoxSelectedArea";
}

function hiddenOptions(thisId){
document.getElementById(thisId+"viewOptions").style.display="none";
if(document.getElementById("level"))
{
document.getElementById("level").style.display="";
}
if(document.getElementById("priority"))
{
document.getElementById("priority").style.display="";
}
}

function makeSelectBox(index,newSelect,value,obj) {
newSelect=newSelect.replace(/(select0)/g,index);
$(obj).html(newSelect);
settingValue(index,value);
}
function GetNewSelectStr(table,index,IsTask){
userList=table;
var downArrowSrc = "../images/sanjiao.gif"; //三角
var downArrowSrcWidth = 16; //宽
var selectBoxWidth =130;
var selectBoxHeight =17;

newSelect="<div id='" + index + "selectBoxs' style='position:absolute;z-index:100;display:none;' onMouseOut=\"setMousePosition('out')\" onkeydown=\"firstLetter('"+ index + "')\"></div>"
newSelect += "<table class='selectTable' cellpadding='0' cellspacing='1' border='0' onClick=\"viewOptionLayer('"+ index + "','"+ IsTask + "',true)\" style='cursor:hand;height:18px;line-height:18px;' onkeydown=\"firstLetter('"+ index + "')\">";
newSelect += " <tr>";
newSelect += " <td>";
newSelect += " <table class='selectTable' cellpadding='0' cellspacing='0' border='0' style='height:18px;border:1px solid #9BB8C8;'>";
if(IsTask)
{
newSelect += " <tr>";
newSelect += " <td><div id='" + index + "selectBoxSelectedValue' name='selectBoxSelectedValue' class='selectBoxSelectedArea' style='width:" + (selectBoxWidth-downArrowSrcWidth-3)+ "px;height:" + selectBoxHeight + "px;overflow:hidden;' onBlur=\"selectBoxBlur('" + index + "');ValueEditd(this)\" onchange='ValueEditd(this)'></div></td>";
}
else
{
newSelect += " <tr style='height:18px;line-height:17px;'>";
newSelect += " <td><div id='" + index + "selectBoxSelectedValue' name='selectBoxSelectedValue' class='selectBoxSelectedArea' style='width:" + (selectBoxWidth-downArrowSrcWidth-4)+ "px;overflow:hidden;' onBlur=\"selectBoxBlur('" + index + "');\"></div></td>";
}
newSelect += " <td><img src='" + downArrowSrc + "' width='" + downArrowSrcWidth + "' border='0'></td>";
newSelect += " </tr>";
newSelect += " </table>";
newSelect += " </td>";
newSelect += " </tr>";
newSelect += "</table>";
return newSelect ;
}
</script>

Javascript 相关文章推荐
解密效果
Jun 23 Javascript
利用jQuery的$.event.fix函数统一浏览器event事件处理
Dec 21 Javascript
jQuery 跨域访问解决原理案例详解
Jul 09 Javascript
js 声明数组和向数组中添加对象变量的简单实例
Jul 28 Javascript
原生js实现网页顶部自动下拉/收缩广告效果
Jan 20 Javascript
使用gulp搭建本地服务器并实现模拟ajax
Apr 05 Javascript
聊聊JS动画库 Velocity.js的使用
Mar 13 Javascript
Vue路由之JWT身份认证的实现方法
Aug 26 Javascript
浅谈layui数据表格判断问题(加入表单元素),设置单元格样式
Oct 26 Javascript
vue项目实现图片上传功能
Dec 23 Javascript
ES6学习笔记之let与const用法实例分析
Jan 22 Javascript
基于elementUI竖向表格、和并列的案例
Oct 26 Javascript
用Javascript 和 CSS 实现脚注(Footnote)效果
Sep 09 #Javascript
Javascript 获取滚动条位置等信息的函数
Sep 08 #Javascript
实现png图片和png背景透明(支持多浏览器)的方法
Sep 08 #Javascript
用Javascript实现锚点(Anchor)间平滑跳转
Sep 08 #Javascript
用 Javascript 验证表单(form)中的单选(radio)值
Sep 08 #Javascript
用 Javascript 验证表单(form)中多选框(checkbox)值
Sep 08 #Javascript
Javascript String.replace的妙用
Sep 08 #Javascript
You might like
PHP Smarty生成EXCEL文档的代码
2008/08/23 PHP
PHP使用PHPMailer发送邮件的简单使用方法
2013/11/12 PHP
ThinkPHP结合ajax、Mysql实现的客户端通信功能代码示例
2014/06/23 PHP
UTF-8正则表达式如何匹配汉字
2015/08/03 PHP
浅谈PHP发送HTTP请求的几种方式
2017/07/25 PHP
PHPExcel实现表格导出功能示例【带有多个工作sheet】
2018/06/13 PHP
asp.net和asp下ACCESS的参数化查询
2008/06/11 Javascript
Jquery知识点三 jquery表单对象操作
2011/01/17 Javascript
jQuery 仿百度输入标签插件附效果图
2014/07/04 Javascript
jQuery简单实现列表隐藏和显示效果示例
2016/09/12 Javascript
基于hover的用法实例(推荐)
2017/07/04 Javascript
vue项目实现github在线预览功能
2018/06/20 Javascript
简单了解Vue + ElementUI后台管理模板
2020/04/07 Javascript
微信小程序实现登录注册功能
2020/12/29 Javascript
Python实现爬取百度贴吧帖子所有楼层图片的爬虫示例
2018/04/26 Python
Python Series从0开始索引的方法
2018/11/06 Python
Python脚本修改阿里云的访问控制列表的方法
2019/03/08 Python
Python函数参数匹配模型通用规则keyword-only参数详解
2019/06/10 Python
Django框架创建mysql连接与使用示例
2019/07/29 Python
Python实现性能自动化测试竟然如此简单
2019/07/30 Python
使用opencv将视频帧转成图片输出
2019/12/10 Python
基于python的docx模块处理word和WPS的docx格式文件方式
2020/02/13 Python
boostrap modal 闪现问题的解决方法
2020/09/01 HTML / CSS
J2SDK1.5与J2SDK5.0有什么区别
2012/09/19 面试题
户外用品商店创业计划书
2014/01/29 职场文书
致长跑运动员广播稿
2014/01/31 职场文书
铁路工务反思材料
2014/02/07 职场文书
机关门卫的岗位职责
2014/04/29 职场文书
廉洁自律演讲稿
2014/05/22 职场文书
小学运动会入场口号
2015/12/24 职场文书
《正面管教》读后有感:和善而坚定的旅程
2019/12/19 职场文书
Python机器学习之逻辑回归
2021/05/11 Python
80行代码写一个Webpack插件并发布到npm
2021/05/24 Javascript
nginx常用配置conf的示例代码详解
2022/03/21 Servers
Nginx代理Redis哨兵主从配置的实现
2022/07/15 Servers
利用Python脚本写端口扫描器socket,python-nmap
2022/07/23 Python