`

JavaScript cookie实现html的select标签刷新后不回到默认值而是保持之前选择值

JavaScriptcookieselect之前选择值 
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
	<base href="<%=basePath%>">
	<title>3G业务</title>
	<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" />
	<meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
	<script type="text/javascript">
		function saveSelectIndex(){   
			var typeId=document.getElementById("typeId");   
			var typeIdText=typeId.options[typeId.selectedIndex].value;   
			var osId=document.getElementById("osId");   
			var osIdText=osId.options[osId.selectedIndex].value;   //设置多个cookie    
			document.cookie="typeIdText="+typeIdText;   
			document.cookie="osIdText="+osIdText;
		}
		function selectIndex(){   //记得初始化，否则会出现undefined   
			var typeIdText=0;   
			var osIdText=0;   //获取多个cookie   
			var coosStr=document.cookie;//注意此处分隔符是分号加空格   
			var coos=coosStr.split("; ");   
			for(var i=0;i<coos.length;i++){      
				var coo=coos[i].split("=");      
				//alert(coo[0]+":"+coo[1]);      
				if("typeIdText"==coo[0]){ 
					typeIdText=coo[1];      
				}
				if("osIdText"==coo[0]){ 
					osIdText=coo[1];      
				}   
			}     
			var typeId=document.getElementById("typeId");   
			if(typeIdText==0){      
				typeId.selectedIndex=0;   
			}else{      
				var length=typeId.options.length;      
				for(var i=0;i<length;i++){ 
					if(typeId.options[i].value==typeIdText){    
						typeId.selectedIndex=i;    
						break; 
					}      
				}   
			}      
			var osId=document.getElementById("osId");   
			if(osIdText==0){      
				osId.selectedIndex=0;   
			}else{      
				var length=typeId.options.length;      
				for(var i=0;i<length;i++){ 
					if(osId.options[i].value==osIdText){    
						osId.selectedIndex=i;    
						break; 
					}      
				}   
			}   
		}
	</script>
	</head>    
	<body onload="selectIndex();">
		<form action="servlet/MoblieServlet?action=query" method="post">
			<fieldset style="width: 250px; height: 160px">
				<legend>3G业务查询</legend>
				<table align="center">    
					<tr>
						<td align="right">分类</td>
						<td>
							<select name="typeId" id="typeId" onchange="saveSelectIndex();">
									<option value="0">请选择...</option>
								  <option value="大类">通信类</option>
								  <option value="中类">资讯类</option>
								  <option value="小类">娱乐类</option>
								  <option value="商品">互联网</option>
							</select>
						</td>    
					</tr>    
					<tr>
						<td align="right">操作系统</td>
						<td>
							<select name="osId" id="osId" onchange="saveSelectIndex();">
								<option value="0">请选择...</option>
								<option value="Unix">android</option>
								<option value="Aix">WM6</option>
								<option value="Linux">WM7</option>
								<option value="Windows">S60 V5</option>
								<option value="Windows">S60 V3</option>
								<option value="Windows">Symbian 3</option>
								<option value="Windows">bada</option>
								<option value="Windows">IOS</option>
								<option value="Windows">webos</option>
								<option value="Windows">linux</option>
							</select>
						</td>
					</tr>    
					<tr align="center">
						<td colspan="2">
							<input type="submit" value="查询" />
							<input type="reset" value="清空" />
						</td>    
					</tr>
				</table>    
			</fieldset>
		</form>    
	</body>
</html>

     运行效果：

     刷新页面，仍然保持当前选择值。

     注意：如上实例，在IE8、Firefox上运行正常，但在Chrome上不能正常运行。

  • 大小: 19.4 KB
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