MyException - 我的异常网
当前位置:我的异常网» 移动开发 » 自定义上拉列表样式

自定义上拉列表样式

www.MyException.Cn  网友分享于:2013-02-20  浏览:4次
自定义下拉列表样式
<!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" lang="zh-CN">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<meta http-equiv="Content-Language" content="zh-CN" />
		<title>用javascript美化Select</title>
		<script type="text/javascript">
			var childCreate = false;
			function Offset(e)
			//取标签的绝对位置
			{
				var t = e.offsetTop;
				var l = e.offsetLeft;
				var w = e.offsetWidth;
				var h = e.offsetHeight - 2;
				while ( e = e.offsetParent) {
					t += e.offsetTop;
					l += e.offsetLeft;
				}
				return {
					top : t,
					left : l,
					width : w,
					height : h
				}
			}

			function loadSelect(obj) {
				//第一步:取得Select所在的位置
				var offset = Offset(obj);
				//第二步:将真的select隐藏
				obj.style.display = "none";
				//第三步:虚拟一个div出来代替select
				var iDiv = document.createElement("div");
				iDiv.id = "selectof" + obj.name;
				iDiv.style.position = "absolute";
				iDiv.style.width = offset.width + "px";
				iDiv.style.height = offset.height + "px";
				iDiv.style.top = offset.top + "px";
				iDiv.style.left = offset.left + "px";
				iDiv.style.background = "url(/articleimg/2007/04/4687/icon_select.gif) no-repeat right 4px";
				iDiv.style.border = "1px solid #3366ff";
				iDiv.style.fontSize = "12px";
				iDiv.style.lineHeight = offset.height + "px";
				iDiv.style.textIndent = "4px";
				document.body.appendChild(iDiv);
				//第四步:将select中默认的选项显示出来
				var tValue = obj.options[obj.selectedIndex].innerHTML;
				iDiv.innerHTML = tValue;
				//第五步:模拟鼠标点击
				iDiv.onmouseover = function() {//鼠标移到
					iDiv.style.background = "url(/articleimg/2007/04/4687/icon_select_focus.gif) no-repeat right 4px";
				}
				iDiv.onmouseout = function() {//鼠标移走
					iDiv.style.background = "url(/articleimg/2007/04/4687/icon_select.gif) no-repeat right 4px";
				}
				iDiv.onclick = function() {//鼠标点击
					if (document.getElementById("selectchild" + obj.name)) {
						//判断是否创建过div
						if (childCreate) {
							//判断当前的下拉是不是打开状态,如果是打开的就关闭掉。是关闭的就打开。
							document.getElementById("selectchild" + obj.name).style.display = "none";
							childCreate = false;
						} else {
							document.getElementById("selectchild" + obj.name).style.display = "";
							childCreate = true;
						}
					} else {
						//初始一个div放在上一个div下边,当options的替身。
						var cDiv = document.createElement("div");
						cDiv.id = "selectchild" + obj.name;
						cDiv.style.position = "absolute";
						cDiv.style.width = offset.width + "px";
						cDiv.style.height = obj.options.length * 20 + "px";
						cDiv.style.top = (offset.top + offset.height + 2) + "px";
						cDiv.style.left = offset.left + "px";
						cDiv.style.background = "#f7f7f7";
						cDiv.style.border = "1px solid silver";
						var uUl = document.createElement("ul");
						uUl.id = "uUlchild" + obj.name;
						uUl.style.listStyle = "none";
						uUl.style.margin = "0";
						uUl.style.padding = "0";
						uUl.style.fontSize = "12px";
						cDiv.appendChild(uUl);
						document.body.appendChild(cDiv);
						childCreate = true;
						for (var i = 0; i < obj.options.length; i++) {
							//将原始的select标签中的options添加到li中
							var lLi = document.createElement("li");
							lLi.id = obj.options[i].value;
							lLi.style.textIndent = "4px";
							lLi.style.height = "20px";
							lLi.style.lineHeight = "20px";
							lLi.innerHTML = obj.options[i].innerHTML;
							uUl.appendChild(lLi);
						}
						var liObj = document.getElementById("uUlchild" + obj.name).getElementsByTagName("li");
						for (var j = 0; j < obj.options.length; j++) {
							//为li标签添加鼠标事件
							liObj[j].onmouseover = function() {
								this.style.background = "gray";
								this.style.color = "white";
							}
							liObj[j].onmouseout = function() {
								this.style.background = "white";
								this.style.color = "black";
							}
							liObj[j].onclick = function() {
								//做两件事情,一是将用户选择的保存到原始select标签中,要不做的再好看表单递交后也获取不到select的值了。
								obj.options.length = 0;
								obj.options[0] = new Option(this.innerHTML, this.id);
								//同时我们把下拉的关闭掉。
								document.getElementById("selectchild" + obj.name).style.display = "none";
								childCreate = false;
								iDiv.innerHTML = this.innerHTML;
							}
						}
					}
				}
			}
		</script>
		<style type="text/css">
			select {
				width: 200px;
				height: 20px;
			}
		</style>
	</head>
	<body>
		<form name="f">
			<fieldset>
				<legend>
					用户注册
				</legend>
				<div>
					<label for="username">帐号</label>
					<input type="text" id="username" name="username" />
				</div>
				<div>
					<label for="pwd">密码</label>
					<input type="password" name="pwd" id="pwd" />
				</div>
				<div>
					<label for="province">省份</label>
					<select id="province" name="province">
						<option value="10">江西</option>
						<option value="11">福建</option>
						<option value="12">广东</option>
						<option value="13">浙江</option>
					</select>
				</div>
			</fieldset>
			<input type="submit" value="提交" name="btnSub" />
		</form>
		<script type="text/javascript">
			loadSelect(document.f.province);
		</script>
	</body>
</html>

 

文章评论

软件开发程序错误异常ExceptionCopyright © 2009-2015 MyException 版权所有