自动提醒文本 _Web前端

自动提示文本
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>自动提示的文本框</title>
<style>
<!--
body{
	font-family:Arial, Helvetica, sans-serif;
	font-size:12px; padding:0px; margin:5px;
}
form{padding:0px; margin:0px;}
input{
	/* 用户输入框的样式 */
	font-family:Arial, Helvetica, sans-serif;
	font-size:12px; border:1px solid #000000;
	width:200px; padding:1px; margin:0px;
}
#popup{
	/* 提示框div块的样式 */
	position:absolute; width:202px;
	color:#004a7e; font-size:12px;
	font-family:Arial, Helvetica, sans-serif;
	left:41px; top:25px;
}
#popup.show{
	/* 显示提示框的边框 */	
	border:1px solid #004a7e;
}
#popup.hide{
	/* 隐藏提示框的边框 */
	border:none;
}
/* 提示框的样式风格 */
ul{
	list-style:none;
	margin:0px; padding:0px;
}
li.mouseOver{
	background-color:#004a7e;
	color:#FFFFFF;
}
li.mouseOut{
	background-color:#FFFFFF;
	color:#004a7e;
}
-->
</style>
<script language="javascript">
var oInputField;	//考虑到很多函数中都要使用
var oPopDiv;		//因此采用全局变量的形式
var oColorsUl;
var aColors = ["red","green","blue","magenta","yellow","chocolate","black","aquamarine","lime","fuchsia","brass","azure","brown","bronze","deeppink","aliceblue","gray","copper","coral","feldspar","orange","orchid","pink","plum","quartz","purple","antiquewith","blanchedalmond","blueviolet","beige","burlywood","bisque","cadetblue","saddlebrown","royalblue","rosybrown","orengered","olivedrab","powderblue","peachpuff","papayawhip","paleturquoise","palevioletred","palegreen","navyblue","navajowhite","palegodenrod","violetred","yellowgreen","tomato","turquoise","thistle","springgreen","steelblue","salmon","scarlet","silver","violet","snow","tan","chartreuse","khaki","mediumslateblue","mediumvioletred","oldlace","maroom","goldenrod","wheat","whitesmoke","moccasin","mistyrose","mintcream","midnightblue","dimgray","darksalmon","slategray","skyblue","sienna","seashell","seagreen","sandybrown","gold","mediumturquoise","navy","mediumspringgreen","mediumseagreen","mediumpurpul","peru","mediumorchid","mediumblue","mediumaquamarine","maroon","limegreen","lightyellow","lightsteelblue","magenta","lightslateblue","lightslategray","lightskyblue","inen","lightseagreen","lightsalmon","lightpink","lightgray","lightgreen","lightgodenrodyellow","indianred","lavender","lightblue","lavenderblush","lightcoral","lightcyan","lightgodenrod","hotpink","greenyellow","lemonchiffon","lawngreen","deepskyblue","honeydew","golenrod","forestgreen","gostwhite","gainsboro","firebrick","dodgerblue","darkturquoise","darkslateblue","darkslategray","darkseagreen","darkred","darkorchid","darkorenge","darkviolet","floralwhite","cyan","darkgray","cornsilk","darkolivegreen","darkgoldenrod","darkblue","darkcyan","darkgreen","darkhaki","ivory","darkmagenta","cornfloewrblue"];
aColors.sort();	//按字母排序，使显示结果更友好
function initVars(){
	//初始化变量
	oInputField = document.forms["myForm1"].colors;
	oPopDiv = document.getElementById("popup");
	oColorsUl = document.getElementById("colors_ul");
}
function clearColors(){
	//清除提示内容
	for(var i=oColorsUl.childNodes.length-1;i>=0;i--)
		oColorsUl.removeChild(oColorsUl.childNodes[i]);
	oPopDiv.className = "hide";
}
function setColors(the_colors){
	//显示提示框，传入的参数即为匹配出来的结果组成的数组
	clearColors();	//每输入一个字母就先清除原先的提示，再继续
	oPopDiv.className = "show";
	var oLi;
	for(var i=0;i<the_colors.length;i++){
		//将匹配的提示结果逐一显示给用户
		oLi = document.createElement("li");
		oColorsUl.appendChild(oLi);
		oLi.appendChild(document.createTextNode(the_colors[i]));

		oLi.onmouseover = function(){
			this.className = "mouseOver";	//鼠标经过时高亮
		}
		oLi.onmouseout = function(){
			this.className = "mouseOut";	//离开时恢复原样
		}
		oLi.onclick = function(){
			//用户点击某个匹配项时，设置输入框为该项的值
			oInputField.value = this.firstChild.nodeValue;
			clearColors();	//同时清除提示框
		}
	}
}
function findColors(){
	initVars();		//初始化变量
	if(oInputField.value.length > 0){
		var aResult = new Array();		//用于存放匹配结果
		for(var i=0;i<aColors.length;i++)	//从颜色表中找匹配的颜色
			//必须是从单词的开始处匹配
			if(aColors[i].indexOf(oInputField.value) == 0)
				aResult.push(aColors[i]);	//压入结果
		if(aResult.length>0)	//如果有匹配的颜色则显示出来
			setColors(aResult);
		else					//否则清除，用户多输入一个字母
			clearColors();		//就有可能从有匹配到无，到无的时候需要清除
	}		
	else
		clearColors();	//无输入时清除提示框（例如用户按del键）
}
</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>