The checked property of radio or checkbox in IE cannot be checked in the initial state _javascript tips

In IE, when using a checkbox or radio, you may find that you cannot sometimes pass checkboxobject.checked = True or Checkboxobject.setattribute (' checked ', true) Method of making a checkbox or radio by preselection.
The solution to this problem is to use the defaultchecked properties of the checkbox or radio to set the Defaultchecked property to True, and the implementation is Checkboxobject.setattribute (' Defaultchecked ', True, or checkboxobject.defaultchecked= true, so that the checkbox and radio are selected in the initial state of IE.
Specific examples:

Copy Code code as follows:

<script type= "Text/javascript" ><!--
var test1= document.getelementbyid ("Checkboxid");
Test1.setattribute (' defaultchecked ', true);
--></script>