下拉菜单输入,根据输入内容自动定位-会员卡,广州印刷,深圳印刷,印刷公司,名片,彩页,名片设计,设计教程,名片制作,彩色名片,名片模板,贵宾卡,pvc卡,设计欣赏,深圳名片,广州名片,business card design

首页	名片设计 CorelDRAW Illustrator AuotoCAD Painter 其他软件 Photoshop Fireworks Flash

» 彩色名片
» PVC卡
» 彩色磁性卡
» 彩页/画册
» 个性印务
» 彩色不干胶
» 明信片
   » 明信片
   » 彩色书签
   » 门挂
» 其他产品与服务
   » 创业锦囊
   » 办公用品
   » 信封、信纸
   » 便签纸、斜面纸砖
   » 无碳复印纸
   » 海报
   » 大篇幅印刷
   » KT板
   » 海报
   » 横幅

下拉菜单输入,根据输入内容自动定位
本文为这个下拉框增加了一点小小的功能：输入能够定位在已有的选择框内。还有一个缺点，各位给改改：输入的时候不能够自动拉开选择框，怎么办？

function getLeftPostion( theObj )
{
var pos = 0;
while ( theObj != null )
{
pos += theObj.offsetLeft;
//get the Object which contain theObj.
theObj = theObj.offsetParent;
}
return pos;
}
function getTopPostion( theObj )
{
var pos = 0;
while ( theObj != null )
{
pos += theObj.offsetTop;
//get the Object which contain theObj.
theObj = theObj.offsetParent;
}
return pos;
}
function checkVersion()
{
var isBadVersion=true;
var curVer=navigator.appVersion;
var pos=parseInt(curVer.indexOf("MSIE"));
if (pos>=1)
{
var intVer=parseInt(curVer.charAt(pos+5));
if (intVer>=5)
{ isBadVersion=false;}
}
if (isBadVersion)
{
var msg="This page may not be displayed properly:n"+
" This product requires Microsoft Internet Explorer 5 or later browser only.";
alert(msg);
}
}

//check the browser version
checkVersion();

// the array of comboBoies
theArray = new Array();

function combobox(objId, objHandler)
{
this.comObj = document.all[objId];
this.comObj.selectedIndex = -1;
this.getValue = getValue;
this.doResize = doResize;
this.doChange = doChange;
this.loseFocus = loseFocus;
this.doSelectIdx = doSelectIdx;
this.focus = focus;
this.keyPress = keyPress;
this.change = change;

var strMsg="";

//------------------------------------------------------------------------------------------------------
// create the text object
//------------------------------------------------------------------------------------------------------
var txtObjIdName = objId + "_text";

if (document.all[txtObjIdName] != null)
{
strMsg="The following id: \\\'" + txtObjIdName +"\\\' is used internally by the Combo Box!rn"+
"Use of this id in your page may cause malfunction. Please use another id for your controls.";
alert(strMsg);
}

var txtInner = "<INPUT type=\\\'text\\\' id=" + txtObjIdName + " name=" + txtObjIdName + " onblur=\\\'" + objHandler + ".loseFocus()\\\' " + " onkeyup=\\\'" + objHandler + ".keyPress()\\\'" + " onchange=\\\'" + objHandler + ".keyPress()\\\'" + " style=\\\'display: none; position: absolute\\\' value=\\\'\\\' >";

this.comObj.insertAdjacentHTML("afterEnd", txtInner);

this.txtObj = document.all[txtObjIdName];

//------------------------------------------------------------------------------------------------------
// end
//------------------------------------------------------------------------------------------------------

this.beResizing = false;
this.doResize();
theArray[theArray.length] = this;
}

function loseFocus()
{
var theComObj = this.comObj;
var theTxtObj = this.txtObj;
var i;
theComObj.selectedIndex = -1;

if (theTxtObj.value == "")
{
return;
}

var optLen = theComObj.options.length;
for (i=0; i<optLen; i++)
{
var comVal = theComObj.options[i].text;
var txtVal = theTxtObj.value;

if (comVal == txtVal)
{
theComObj.selectedIndex = i;
return;
}
}
}

function doResize()
{
if (!this.beResizing)
{
this.beResizing = true;
this.txtObj.style.display="none";
this.comObj.style.position="static";
this.txtObj.style.posLeft = getLeftPostion(this.comObj);
this.txtObj.style.posTop = getTopPostion(this.comObj) + 1;
this.txtObj.style.posWidth = this.comObj.offsetWidth - 16;
this.txtObj.style.posHeight = this.comObj.offsetHeight;
this.comObj.style.position ="absolute";
this.comObj.style.posLeft = this.txtObj.style.posLeft;
this.comObj.style.posTop = this.txtObj.style.posTop;
this.offWidth = this.comObj.offsetWidth;

var strRect = "rect(0 "+(this.comObj.offsetWidth)+" "+ this.comObj.offsetHeight + " "+(this.txtObj.style.posWidth - 2 )+")";

this.comObj.style.clip = strRect;
this.txtObj.style.display="";
this.beResizing = false;
}
}

function doChange()
{
var idx = this.comObj.selectedIndex;
var opt = this.comObj.options[idx];
this.txtObj.value = opt.text;
this.txtObj.focus();
this.txtObj.select();
this.comObj.selectedIndex=-1;
}

function getValue()
{
return this.txtObj.value;
}

function doSelectIdx(i)
{
var optLen = this.comObj.options.length;

if ((i >=0) && (i < optLen))
{
this.comObj.selectedIndex = i;
this.txtObj.value = this.comObj.options[i].text;
return;
}
this.txtObj.value = "";
}

function focus()
{
this.txtObj.focus();
}

/*resize all combobox when window be resized*/
function resetAllSize()
{
var i;
for (i=0; i < theArray.length; i++)
{
theArray[i].doResize();
}
}
////////////////定位函数开始，我加的///////////////
function keyPress()
{
var txtStr;
var comStr;
var maxInt = 0;
var defInt = 0;
var defJ;
txtStr = this.txtObj.value;
//document.form1.test.value=txtStr;
var j;
for(j=0;j<this.comObj.options.length;j++)
{
comStr = this.comObj.options[j].text;
var m;
for(m=0;m<txtStr.length+1;m++)
{
if(txtStr.charCodeAt(m) != comStr.charCodeAt(m))
{
maxInt = m;
break;
}
}
if (defInt < maxInt)
{
defInt = maxInt;
defJ = j;
}
}
this.comObj.selectedIndex = defJ;
}

返回类别: 教程
上一教程: 如何用ASP创建日志文件
下一教程: 实现UBB代码

您可以阅读与"下拉菜单输入,根据输入内容自动定位"相关的教程:
· 下拉菜单支持输入，并根据输入内容自动定位
· 不刷新页面改变下拉菜单内容
· 用DHTML来模仿实现下拉菜单
· 三层动态下拉菜单的例子
· 介绍一个制作下拉菜单完全不同的办法


	快精灵印艺坊版权所有	首页会员中心在线印刷在线编辑付款方式索取样品设计指南连锁门店网站地图关于我们友情链接