JavaScript的在ASPX两个复选框 [英] javascript for two checkboxes in aspx

问题描述

我有一个文本框和两个复选框与一个提交按钮。我想提出一个的CustomValidator其中应拨打下列条件一个JavaScript -

I have one textbox and two checkboxes with a submit button. I want to put a customvalidator which shall call a javascript for the following condition -

如果textbox.value> 0，则checkbox1 =检查或checkbox2 =检查。如果没有复选框选中时textbox.value> 0，则引发错误。

If textbox.value > 0 then checkbox1 = checked or checkbox2 = checked. If neither checkboxes checked when textbox.value > 0 then raise error.

什么想法？

推荐答案

这就是我假设你想要的：

This is what I'm assuming you want:

function validate()
{
  var t = document.getElementByID( "myTextbox" );
  var c1 = document.getElementByID( "myCheckbox1" );
  var c2 = document.getElementByID( "myCheckbox2" );

  if( t.value != "" )
  {
    if( !(c1.checked || c2.checked) )
    {
      alert( "You didn't do what I wanted you to do. Bad user!" );
      return( false );
    }
  }

  return( true );
}

和

<form method=post action=blah onsubmit="JavaScript: return( validate() );">
  <input type=text id=myTextbox name=blah><br>
  <input type=checkbox id=myCheckBox1 name=blah><br>
  <input type=checkbox id=myCheckBox2 name=blah><br>
  <input type=submit>
</form>

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