jquery set all checkbox checked

Question

I am using jquery 1.11.1 and this is my code:

$(\"#rowchkall\").change(function(){
    if($(this).is(\':checked\')){
        $(\"input:checkbox[class=rowchk]         


        

Answer 1

$("#rowchkall").change(function(){
    if($(this).is(':checked')){
        $("input.rowchk[type=checkbox]").each(function() {
            alert("set checked");
            $(this).attr('checked',true);
        });
    }else{
        $("input.rowchk[type=checkbox]").each(function() {
            $(this).attr('checked', false);
        });
    } 
});