Introduction to jquery traversing checkbox_jquery

checkbox Select all Cancel
$("#ChkAll").click(function(){
$("#divContent input[type=' checkbox']").attr("checked",$(this).attr("checked"));
});

Get the value of the selected checkbox:
var arrChk=$("input[name='chk_list'][checked]");
$ (arrChk).each(function(){
            window.alert(this.value);                                                                                             

$("#checkbox_id").attr("checked"); //Get the status of a CheckBox (whether it is selected, return true/false)

$("#checkbox_id").attr("checked",true); //Set the status of a CheckBox to checked (checked=true)