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JavaScript實現帶自動提示的文本框效果代碼

編輯：關於ASP編程

示例一：直接編寫AJAX 實現。
客戶端：
復制代碼代碼如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Ajax實現自動提示的文本框</title>
<style>

</style>
<script language="javascript">
var oInputField; //考慮到很多函數中都要使用
var oPopDiv; //因此采用全局變量的形式
var oColorsUl;
var xmlHttp;
function createXMLHttpRequest(){
if(window.ActiveXObject)
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
else if(window.XMLHttpRequest)
xmlHttp = new XMLHttpRequest();
}
function initVars(){
//初始化變量
oInputField = document.forms["myForm1"].colors;
oPopDiv = document.getElementById("popup");
oColorsUl = document.getElementById("colors_ul");
}
function clearColors(){
//清除提示內容
for(var i=oColorsUl.childNodes.length-1;i>=0;i--)
oColorsUl.removeChild(oColorsUl.childNodes[i]);
oPopDiv.className = "hide";
}
function setColors(the_colors){
//顯示提示框，傳入的參數即為匹配出來的結果組成的數組
clearColors(); //每輸入一個字母就先清除原先的提示，再繼續
oPopDiv.className = "show";
var oLi;
for(var i=0;i<the_colors.length;i++){
//將匹配的提示結果逐一顯示給用戶
oLi = document.createElement("li");
oColorsUl.appendChild(oLi);
oLi.appendChild(document.createTextNode(the_colors[i]));
oLi.onmouseover = function(){
this.className = "mouseOver"; //鼠標經過時高亮
}
oLi.onmouseout = function(){
this.className = "mouseOut"; //離開時恢復原樣
}
oLi.onclick = function(){
//用戶點擊某個匹配項時，設置輸入框為該項的值
oInputField.value = this.firstChild.nodeValue;
clearColors(); //同時清除提示框
}
}
}
function findColors(){
initVars(); //初始化變量
if(oInputField.value.length > 0){
createXMLHttpRequest(); //將用戶輸入發送給服務器
var sUrl = "9-10.aspx?sColor=" + oInputField.value + "×tamp=" + new Date().getTime();
xmlHttp.open("GET",sUrl,true);
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState == 4 && xmlHttp.status == 200){
var aResult = new Array();
if(xmlHttp.responseText.length){
aResult = xmlHttp.responseText.split(",");
setColors(aResult); //顯示服務器結果
}
else
clearColors();
}
}
xmlHttp.send(null);
}
else
clearColors(); //無輸入時清除提示框（例如用戶按del鍵）
}
</script>
</head>
<body>
<form method="post" name="myForm1">
Color: <input type="text" name="colors" id="colors" onkeyup="findColors();" />
</form>
<div id="popup">
<ul id="colors_ul"></ul>
</div>
</body>
</html>

服務器端（9-10.aspx ）：
復制代碼代碼如下:
<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System.Data" %>
<%
Response.CacheControl = "no-cache";
Response.AddHeader("Pragma","no-cache");
string sInput = Request["sColor"].Trim();
if(sInput.Length == 0)
return;
string sResult = "";
string[] aColors = new string[]{"aliceblue","antiquewith","aquamarine","azure","beige","bisque","black","blanchedalmond","blue","blueviolet","brass","bronze","brown","burlywood","cadetblue","chartreuse","chocolate","copper","coral","cornfloewrblue","cornsilk","cyan","darkblue","darkcyan","darkgoldenrod","darkgray","darkgreen","darkhaki","darkmagenta","darkolivegreen","darkorchid","darkorenge","darkred","darksalmon","darkseagreen","darkslateblue","darkslategray","darkturquoise","darkviolet","deeppink","deepskyblue","dimgray","dodgerblue","feldspar","firebrick","floralwhite","forestgreen","fuchsia","gainsboro","gold","goldenrod","golenrod","gostwhite","gray","green","greenyellow","honeydew","hotpink","indianred","inen","ivory","khaki","lavender","lavenderblush","lawngreen","lemonchiffon","lightblue","lightcoral","lightcyan","lightgodenrod","lightgodenrodyellow","lightgray","lightgreen","lightpink","lightsalmon","lightseagreen","lightskyblue","lightslateblue","lightslategray","lightsteelblue","lightyellow","lime","limegreen","magenta","magenta","maroom","maroon","mediumaquamarine","mediumblue","mediumorchid","mediumpurpul","mediumseagreen","mediumslateblue","mediumspringgreen","mediumturquoise","mediumvioletred","midnightblue","mintcream","mistyrose","moccasin","navajowhite","navy","navyblue","oldlace","olivedrab","orange","orchid","orengered","palegodenrod","palegreen","paleturquoise","palevioletred","papayawhip","peachpuff","peru","pink","plum","powderblue","purple","quartz","red","rosybrown","royalblue","saddlebrown","salmon","sandybrown","scarlet","seagreen","seashell","sienna","silver","skyblue","slategray","snow","springgreen","steelblue","tan","thistle","tomato","turquoise","violet","violetred","wheat","whitesmoke","yellow","yellowgreen"};
for(int i=0;i<aColors.Length;i++){
if(aColors[i].IndexOf(sInput) == 0)
sResult += aColors[i] + ",";
}
if(sResult.Length>0) //如果有匹配項
sResult = sResult.Substring(0,sResult.Length-1); //去掉最後的“,”號
Response.Write(sResult);
%>

示例二：使用jQuery 實現。
客戶端：

復制代碼代碼如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>jQuery實現自動提示的文本框</title>
<style>

</style>
<script language="javascript" src="jquery.min.js"></script>
<script language="javascript">
var oInputField; //考慮到很多函數中都要使用
var oPopDiv; //因此采用全局變量的形式
var oColorsUl;
function initVars(){
//初始化變量
oInputField = $("#colors");
oPopDiv = $("#popup");
oColorsUl = $("#colors_ul");
}
function clearColors(){
//清除提示內容
oColorsUl.empty();
oPopDiv.removeClass("show");
}
function setColors(the_colors){
//顯示提示框，傳入的參數即為匹配出來的結果組成的數組
clearColors(); //每輸入一個字母就先清除原先的提示，再繼續
oPopDiv.addClass("show");
for(var i=0;i<the_colors.length;i++)
//將匹配的提示結果逐一顯示給用戶
oColorsUl.append($("<li>"+the_colors[i]+"</li>"));
oColorsUl.find("li").click(function(){
oInputField.val($(this).text());
clearColors();
}).hover(
function(){$(this).addClass("mouseOver");},
function(){$(this).removeClass("mouseOver");}
);
}
function findColors(){
initVars(); //初始化變量
if(oInputField.val().length > 0){
//獲取異步數據
$.get("14-10.aspx",{sColor:oInputField.val()},
function(data){
var aResult = new Array();
if(data.length > 0){
aResult = data.split(",");
setColors(aResult); //顯示服務器結果
}
else
clearColors();
});
}
else
clearColors(); //無輸入時清除提示框（例如用戶按del鍵）
}
</script>
</head>
<body>
<form method="post" name="myForm1">
Color: <input type="text" name="colors" id="colors" onkeyup="findColors();" />
</form>
<div id="popup">
<ul id="colors_ul"></ul>
</div>
</body>
</html>

服務器端（14-10.aspx ）：
復制代碼代碼如下:
<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System.Data" %>
<%
Response.CacheControl = "no-cache";
Response.AddHeader("Pragma","no-cache");
string sInput = Request["sColor"].Trim();
if(sInput.Length == 0)
return;
string sResult = "";
string[] aColors = new string[]{"aliceblue","antiquewith","aquamarine","azure","beige","bisque","black","blanchedalmond","blue","blueviolet","brass","bronze","brown","burlywood","cadetblue","chartreuse","chocolate","copper","coral","cornfloewrblue","cornsilk","cyan","darkblue","darkcyan","darkgoldenrod","darkgray","darkgreen","darkhaki","darkmagenta","darkolivegreen","darkorchid","darkorenge","darkred","darksalmon","darkseagreen","darkslateblue","darkslategray","darkturquoise","darkviolet","deeppink","deepskyblue","dimgray","dodgerblue","feldspar","firebrick","floralwhite","forestgreen","fuchsia","gainsboro","gold","goldenrod","golenrod","gostwhite","gray","green","greenyellow","honeydew","hotpink","indianred","inen","ivory","khaki","lavender","lavenderblush","lawngreen","lemonchiffon","lightblue","lightcoral","lightcyan","lightgodenrod","lightgodenrodyellow","lightgray","lightgreen","lightpink","lightsalmon","lightseagreen","lightskyblue","lightslateblue","lightslategray","lightsteelblue","lightyellow","lime","limegreen","magenta","magenta","maroom","maroon","mediumaquamarine","mediumblue","mediumorchid","mediumpurpul","mediumseagreen","mediumslateblue","mediumspringgreen","mediumturquoise","mediumvioletred","midnightblue","mintcream","mistyrose","moccasin","navajowhite","navy","navyblue","oldlace","olivedrab","orange","orchid","orengered","palegodenrod","palegreen","paleturquoise","palevioletred","papayawhip","peachpuff","peru","pink","plum","powderblue","purple","quartz","red","rosybrown","royalblue","saddlebrown","salmon","sandybrown","scarlet","seagreen","seashell","sienna","silver","skyblue","slategray","snow","springgreen","steelblue","tan","thistle","tomato","turquoise","violet","violetred","wheat","whitesmoke","yellow","yellowgreen"};
for(int i=0;i<aColors.Length;i++){
if(aColors[i].IndexOf(sInput) == 0)
sResult += aColors[i] + ",";
}
if(sResult.Length>0) //如果有匹配項
sResult = sResult.Substring(0,sResult.Length-1); //去掉最後的“,”號
Response.Write(sResult);
%>