Posted in Javascript onMay 30, 2010
看下效果图:
源代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Input Limiter Demo</title> <link rel="stylesheet" type="text/css" href="jquery.inputlimiter.1.0.css" /> <script type="text/javascript" src="jquery-1.3.2.min.js"></script> <script type="text/javascript" src="jquery.inputlimiter.1.2.js"></script> <style type="text/css"> body { font-family: verdana; } #limitingtext { color: #333; font-size: 90%; } </style> <script type="text/javascript"> function create_xmlDoc(){ var xmlDoc = null; try //Internet Explorer { xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); } catch(e) { try //Firefox, Mozilla, Opera, etc. { xmlDoc=document.implementation.createDocument("","",null); } catch(e) { alert(e.message); return; } } return xmlDoc; } $(document).ready(function() { var xmlDoc = create_xmlDoc(); xmlDoc.async=false; xmlDoc.load("test.xml"); var x=xmlDoc.getElementsByTagName("channel"); for( var i=0; i<x.length; i++ ){ if(x[i].getAttribute("CID") == '1'){ num = x[i].childNodes[0].getAttribute("fNum"); strfield = x[i].childNodes[0].getAttribute("FID"); //为每个自定义字段绑定字数限制功能 $("#"+strfield).inputlimiter({ limit: num, remText: '你还能输入 %n 个字', remFullText: '你输入的字数已超过限制数值', limitText: '' }); //$("#hidNum").val(num); } } $("#SendLimiter").click(function(){ if($("#Num").val().length==0){ alert("限制字数不能为空!"); return; } if(isdigit($("#Num").val())==0){ alert("请输入数字!"); return; } $.ajax({ url:'SaveLimiter.asp', //后台处理程序 type:'Post', //数据发送方式 data:"Num=" + $("#Num").val() + "&ChannelID=1"+"&Field="+$("#sel").val(), //要传递的数据 success:update_page, //回传函数(这里是函数名) error:errorInfo }); }); //回传函数实体,参数为XMLhttpRequest.responseText function update_page (data) { //alert(data); alert("提交成功!"); } function errorInfo(data){ alert("提交失败!"+data.responseText); } //判断输入值是否是数字 function isdigit(s){ var r,re; re = /\d*/i; //\d表示数字,*表示匹配多个数字 r = s.match(re); return (r==s)?1:0; } }); </script> </head> <body> <h1>字数限制功能列子</h1> <form > <fieldset> <legend>字数限制</legend> 标题:<input type="text" id="TITLE" size="50" style="border: 1px solid gray"/><br /> 自定义字段1:<input type="text" id="ceshi1" size="50" style="border: 1px solid gray"/><br /> 自定义字段2:<input type="text" id="ceshi2" size="50" style="border: 1px solid gray"/><br /> </label><br /><br /> <label>字数限制设置: <select id="sel"> <option value="TITLE">标题</option> <option value="ceshi1">自定义字段1</option> <option value="ceshi2">自定义字段2</option> </select> <input type="text" class="cmsField" style="width:80px" id="Num"><input type="button" value="提交" id="SendLimiter"> </fieldset> </form> </body> </html>
这里的限制字数是动态设置的,所以配置了一个ASP页面和一个XML文件
ASP
<% num = Trim(Request("Num")) '字数限制值 channelid = Trim(Request("ChannelID")) '频道ID sfield = Trim(Request("Field")) '需设定的字数限制值的字段 set objDom = server.CreateObject("MicroSoft.XMLDom") objDom.load(Server.MapPath("test.xml")) Set objNode = objDom.documentElement '节点长度 newint=objNode.ChildNodes.length-1 for i=0 To newint '节点id属性 set objarr=objNode.ChildNodes.item(i) if ( objarr.Attributes.item(1).Text = channelid) then if( objarr.ChildNodes.item(0).Attributes.item(1).Text = sfield ) then '直接定位到节点的ID下属性的内容 objDom.getElementsByTagName("channel").item(i).childNodes.item(0).Attributes.item(2).Text = num exit for end if end if set objarr = Nothing next objDom.save(Server.MapPath("test.xml")) set objNode = Nothing Set objDom = Nothing %>
XML
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <TurboCMSXML> <channel cName="测试频道1" CID="1"> <Field fName="标题" FID="TITLE" fNum="20"/> </channel> <channel cName="测试频道1" CID="1"> <Field fName="自定义字段1" FID="ceshi1" fNum="20"/> </channel> <channel cName="测试频道1" CID="1"> <Field fName="自定义字段2" FID="ceshi2" fNum="200"/> </channel> <channel cName="首页2" CID="2"> <Field fName="测试2" FID="ceshi2" fNum="20"/> </channel> <channel cName="首页3" CID="3"> <Field fName="测试3" FID="ceshi3" fNum="10"/> </channel> <channel cName="首页4" CID="4"> <Field fName="测试4" FID="ceshi4" fNum="20"/> </channel> </TurboCMSXML>
基于jquery的inputlimiter 实现字数限制功能
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