RemoveAttr 不会删除禁用

Question

   <input type="checkbox" name="checking">j'accepte les conditions
   <input type="submit" value="Valider"  id="valide" disabled/>

<script>
    $(document).ready(function(){

         if((input=$("input:checkbox[name=checking]").is(":checked"))){
            $("#valide").prop('disabled',true);
         }

});
    </script>

Hi, i want enable button (valide) when i checked checkbox

Answer 1

Simply listen for the 'change' event on checkbox and enable/disable the button accordingly.

$("input:checkbox[name=checking]").on('change',function(){
     $("#valide").prop('disabled', !this.checked);        
})

Here's the demo

Answer 2

So...respond to a click on the checkbox setting disabled to false if the checkbox is ticked. In this example, I'm assuming you also want to set disabled to true if the checkbox is unticked again:

if((input=$("input:checkbox[name=checking]").is(":checked"))){
    $("#valide").prop('disabled',true); // <== You might want to make this depend on the initial state of the checkbox
}
input.on("click", function() {
    $("#valide").prop('disabled', !this.checked);
});

Answer 3

FIDDLE :

$(function () {
   $(':checkbox[name=checking]').click(function () {
      if ($(this).is(':checked')) $('#valide').prop('disabled', false);
   });
});

Answer 4

you must add listener to check box for call function every time when user check or uncheck it

try this sloution :)

   <input type="checkbox" onclick="check()" name="checking">j'accepte les            conditions
   <input type="submit" value="Valider"  id="valide" disabled/>





     function check(){
    if($('input[name=checking]').is(":checked")){
        $("#valide").prop('disabled',false);
    }else{
    $("#valide").prop('disabled',true);
    }
    }

please be sure to add javascript code after your html code

demo Click here