使用Java脚本验证时如何更改文本框的颜色. [英] How to change color of a text box while validating using java script.

问题描述

我有一个文本框，我正在尝试验证(即必填字段)，
如下

HI i have a text box which i''m trying to validate(i.e. a required Field),
as follows

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <asp:TextBox ID="txt1" runat="server"></asp:TextBox>
  <asp:Button ID="Button2" runat="server"

                    onclientclick="return validation();" Text="Button" />

如何为此

How to perform javascript validation for this

推荐答案

<script language="javascript">
 function validation() {
 if (document.getElementById('MainContent_txt1').value == "")
      {
          alert('textbox should not blank');
          document.getElementById('MainContent_txt1').style.background = "#FF9F9F";
          return false;
      }
 }
    </script>

参阅这些内容可能对您有帮助

http://stackoverflow.com/Questions/196859/change-text-box-color-using-required-field-validator-no-extender-controls-pleas [ http://community.devexpress.com/forums/p/78428/268295.aspx [ ^ ]

Refer these may help you

http://stackoverflow.com/questions/196859/change-text-box-color-using-required-field-validator-no-extender-controls-pleas[^]

http://community.devexpress.com/forums/p/78428/268295.aspx[^]

请参考以下线程:
如何使用以下方法更改元素的类属性JavaScript [ ^ ]
如何更改文本框中的多个单词的颜色使用asp.net和javascript [ ^ ]

Please refer following thread:
How to Change the Class Attribute of an Element using JavaScript[^]
how to change the color of mutiple words in textbox using asp.net and javascript[^]

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