unable to pass boolean value

I have a form field/checkbox and am unable to pass the boolean value even though it is selected.

 <input type="checkbox" name="IsContactValid"
               id=" IsContactValid" 
                  <cfif                        
                        ContactView.GetIsContactValid()>CHECKED
         </cfif>>
that will be transmitted to the receiving form if the box is checked.

Kindly help.

From stackoverflow vas

• You can give the check box a value:

   <input type="checkbox" name="IsContactValid" value="1"
                 id=" IsContactValid" 
                    <cfif                        
                          ContactView.GetIsContactValid()>CHECKED
           </cfif>>
  

  that will be transmitted to the receiving form if the box is checked.

  Al Everett : `checked="checked"` is more valid for more recent HTML standards.

  Henry : I wouldn't say "more valid". CHECKED by itself is fine for HTML 4.01 and 5.

  vas : Yes but in this case CHECKED on its own did not work.
  From Pekka