本文是我在平时工作中所遇到的javascript方面的一些知识总结,主要针对在asp.net中使用脚本。

1.TextBox的验证(这个其实算是正则的内容了)

<!--用正则表达式限制只能输入中文-->
<input type="text" onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))" />
<!--用正则表达式限制只能输入数字-->
<input type="text" onkeyup="value=value.replace([^\d]/g,'') "
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" />
<!--用正则表达式限制只能输入数字和英文-->
<input type="text" onkeyup="value=value.replace([\W]/g,'') "
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" />
<!--驗證數字和小數點-->
<input type="text" ID="Text1" onkeyup="value=value.replace(/[^\d|^\.]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d|^\.]/g,''))">

上面代码中 onbeforepaste属性是防止复制粘贴

  1. 判断CheckBoxList有没有选择
//id为CheckBoxList控件的ID
//return true 说明没有选择
function checkLocCate(id) {
var status = true;
var inputs = document.getElementById(id).getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
if (inputs[i].type == "checkbox" && inputs[i].checked == true) {
status = false;
}
}
return status;
}

3.为DropDownList添加项

//id为DropDownList控件的ID
function addOptions(id) {
var ddl = document.getElementById(id);
//将DropDownList的内容清空
ddl.options.length = 0;
for (var i = 0; i < 10; i++) {
//Options的第一个参数为Text值,第二个参数为Value值
ddl.add(new Option(i, i));
}
}

4.为table添加行和列

在javascript中添加行和列是通过insertRow和inertCell来实现的,看下面一个例子

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>AddRow</title>
<style type="text/css">
.BlackBorder
{
background-color: #000;
font-size: 12px;
}
.BlackBorder tr
{
background-color: #fff;
}
</style>
</head>
<body>
<form id="form2" runat="server">
<div>
<table width="400px">
<tr>
<td>
姓名:
<input id="txtName" style="width: 100px;" />
年龄:
<input id="txtAge" style="width: 50px;" />
<input id="txtAdd" type="button" value="新增" onclick="return insertRow()" />
</td>
</tr>
<tr>
<td>
<table id="tMemInfo" width="100%" class="BlackBorder" cellpadding="0" cellspacing="1"
border="0" style="padding-left: 5px;">
<tr style="background-color: #E0E0E0;">
<td style="width: 150px;">
姓名
</td>
<td style="width: 100px;">
年龄
</td>
<td>
管理
</td>
</tr>
</table>
</td>
</tr>
</table>
</div>
</form>
<script type="text/javascript">
function insertRow() {
var name = document.getElementById("txtName").value;
var age = document.getElementById("txtAge").value;
if (name == "") {
alert("請填寫姓名");
document.getElementById("txtName").focus();
return false;
}
if (age == "") {
alert("請填寫年龄");
document.getElementById("txtAge").focus();
return false;
}
var myTable = document.getElementById("tMemInfo");
var objRow = myTable.insertRow(1);
var objCell = objRow.insertCell(0);
objCell.innerHTML = "<input type='text' style='width:100px;' style='display:none'/><span >"
+ name + "</span>";
var objCell = objRow.insertCell(1);
objCell.innerHTML = "<input type='text' style='width:50px;' style='display:none'/><span >"
+ age + "</span>";
var objCell = objRow.insertCell(2);
objCell.innerHTML = " <input type='button' value='取消' onclick='cancel()' style='display:none'/> " +
" <input type='button' value='儲存' onclick='save()' style='display:none'/>" +
" <input type='button' value='修改' onclick='edit()' />" +
" <input type='button' value='删除' onclick='deleteRow()' />";
document.getElementById("txtName").value = "";
document.getElementById("txtAge").value = "";
document.getElementById("txtName").focus();
}
//删除行
function deleteRow() {
var myTable = document.getElementById("tMemInfo");
var trList = myTable.getElementsByTagName("tr");
var row = 0;
for (var i = 0; i < trList.length; i++) {
if (event.srcElement.parentNode.parentNode == trList[i])
row = i;
}
myTable.deleteRow(row);
}
function cancel() {
var e = event.srcElement.parentElement.parentElement;
e.childNodes[0].childNodes[0].style.display = "none";
e.childNodes[0].childNodes[1].style.display = "";
e.childNodes[1].childNodes[0].style.display = "none";
e.childNodes[1].childNodes[1].style.display = "";
e.childNodes[2].childNodes[0].style.display = "none";
e.childNodes[2].childNodes[2].style.display = "none";
e.childNodes[2].childNodes[4].style.display = "";
e.childNodes[2].childNodes[6].style.display = "";
}
function save() {
var e = event.srcElement.parentElement.parentElement;
e.childNodes[0].childNodes[0].style.display = "none";
e.childNodes[0].childNodes[1].style.display = "";
e.childNodes[1].childNodes[0].style.display = "none";
e.childNodes[1].childNodes[1].style.display = "";
e.childNodes[2].childNodes[0].style.display = "none";
e.childNodes[2].childNodes[2].style.display = "none";
e.childNodes[2].childNodes[4].style.display = "";
e.childNodes[2].childNodes[6].style.display = "";
e.childNodes[0].childNodes[1].innerHTML = e.childNodes[0].childNodes[0].value;
e.childNodes[1].childNodes[1].innerHTML = e.childNodes[1].childNodes[0].value;
}
function edit() {
var e = event.srcElement.parentElement.parentElement;
e.childNodes[0].childNodes[0].style.display = "";
e.childNodes[0].childNodes[1].style.display = "none";
e.childNodes[1].childNodes[0].style.display = "";
e.childNodes[1].childNodes[1].style.display = "none";
e.childNodes[2].childNodes[0].style.display = "";
e.childNodes[2].childNodes[2].style.display = "";
e.childNodes[2].childNodes[4].style.display = "none";
e.childNodes[2].childNodes[6].style.display = "none";
e.childNodes[0].childNodes[0].value = e.childNodes[0].childNodes[1].innerHTML;
e.childNodes[1].childNodes[0].value = e.childNodes[1].childNodes[1].innerHTML;
}
</script>
</body>
</html>

5 在javascript中setTimeOut和setInterval的區別

//1秒钟执行一次函数1
window.setInterval("函數1", 1000);
//延迟1秒钟执行函数2
window.setTiemout("函數2", 1000);

6 js获取字符串的长度

var str = str.replace(/[^\x00-\xff]/g, "**").length;

7 javascript中的一些验证

//去空格
function trim(str) {
return str.replace(/(^\s*)|(\s*$)/g, "");
}
//validate email
function IsMail(mail)
{
var patrn = /^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/;
return patrn.test(mail);
}
//validate url
function IsURL(url)
{
var regexp = /^http://[A-Za-z0-9]+.[A-Za-z0-9]+[/=?%-&_~`@[]':+!]*([^<>""])*$/;
return regexp.test(url);
}

不断更新中……