javascript - how do you remember a checkbox in a cookie. -

i want know how remember check box value in cookie have method createcookie. method:

 function createcookie(name,value,days) {         if (days) {             var date = new date();             date.settime(date.gettime()+(days*24*60*60*1000));             var expires = "; expires="+date.togmtstring();         }         else var expires = "";         document.cookie = name+"="+value+expires+"; path=/";     } 

i think should read article(it permalink script, if have time read all, understand how cookie work).

however code cookie value:

function readcookie(name) {     var nameeq = name + "=";     var ca = document.cookie.split(';');     for(var i=0;i < ca.length;i++) {         var c = ca[i];         while (c.charat(0)==' ') c = c.substring(1,c.length);         if (c.indexof(nameeq) == 0) return c.substring(nameeq.length,c.length);     }     return null; }