单选按钮列表上的运行时验证 [英] run time validation on a radiobutton list

问题描述

首先，祝所有朋友新年快乐.我有一个带有单选按钮列表和文本框的页面.我需要在文本框上进行验证，以便如果单选按钮选择的项目为1，则文本框应接受3个字符，如果单选按钮选择的项目为为2，则texbox应该精确地取10个字符.
在此先感谢.

First of all,happy new year to all my friends.i have a page with a radiobuttonlist and a textbox.I need to put validation on a textbox such that if radiobutton selected item is 1 then textbox should accept 3 characters and if radiobuttonlist selected item is 2,then texbox shoult take exactly 10 characters.
thanks in advance.

推荐答案

为此使用javascript

添加以下功能单选按钮的onclick事件

use javascript for that

add below function onclick event of radio button

<script type="text/javascript">
function validate(ctr)
{
try
{
if (ctr.checked)
{
var txt=document.getElementByID(txtboxid).value;

if (txt.lenght>3 )
{
document.getElementByID(txtboxid).value='';
alert('TextBox lenght should be less than 10 character');
}
}

}
catch(Error)
{
alert(Error);
}

}

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