$('‪#‎ tbl_A‬').on("click",".chk_all",function(event){ //chk.all is the class of //select all checkbox
if($(this).checked) { 
$('.chk_cls_candidate').each(function(){//.chk_cls_candidate refers to class of other dynamically generated checkbox 
$(this).checked=true;
});
}
else
{

});

But the code is not working.

Please help.

More description about the problem-

I have generated checkboxes on the fly with the records I am fetching with the database.Those ch eckboxes has been given a class name so that i could be able to access them to perform some operation.I am also generating a checkbox on the fly which has a different class name say chk_all. Now I want to select all those chekboxes with the classname chk_cls_candidate when I click the checkbox with the class name chk_all.