var del_id = "del"+countPage+"-"+questionCount;
 html+='<tr><td><input type="button" value="delete" id="'+del_id+'" /><td><input type="button" value="Copy" id="copy_id"/></tr>';
        $("#"+del_id).click(function(){
                                alert("jkhkjh");
                              });

html+='<tr><td id="'+del_id+'"><input type="button" value="delete" id="'+del_id+'" /><td><input type="button" value="Copy" id="copy_id"/></tr>';


        $(document).on("click", "#"+del_id, function(){
                       alert("jkhkjh");
                       });

$(document).on("click", "#"+del_id, function(){

$(document).on("click", "[type='button'][id^='del']", function(){

$(document).on("click", ".buttonClass", function(){

$(document).on('click', 'buttonId/Class', function(){
   // Do something.
})

$(document).on("click", "#"+del_id, function(){

});

$('body').on("#"+del_id, 'click', function(){
   //Do something.
});