问joomla按钮的验证

EN

<script type="text/javascript">
function confirm_delete() {
    var answer = confirm("Are you sure you want to delete?")
    if (answer){
        //run delete script
    }
    else{
        //go back to previous page
    }
}
</script>

<script type="text/javascript">
   Joomla.submitbutton = function(task){
        if(task == 'Unpublish'){
              var answer = confirm("Are you sure you want to delete?")
              if(answer){
                    submitbutton(task); // run the unpublish script on controller
              }
              else{
                    return false;
              }
        }

        submitbutton(task);
   }
</script>