JS cookie

<input  onclick="checkVisit('1')" type="button" value="Accept(cookie 1h)" />   //设置cookie一小时过期

function getCookie(name) {   var arg = name+ "=";   var alen = arg.length;   var clen = document.cookie.length;   var i = 0;   var value;   var start = 0;   var end = 0;   if(clen > 0 && document.cookie.indexOf(arg) >= 0) {      start = document.cookie.indexOf(arg) + alen;      end = document.cookie.indexOf(";", start);  if(end==-1) end=clen;      value = document.cookie.substring(start, end);      return value;   }   return null;}function setCookie(name, value,hours) {var date = new Date();    date.setTime(date.getTime() + hours*60*60*1000);    document.cookie = name + "=" + value + ";path=/; expires=" + date.toGMTString();}function delCookie(name){var visit = getCookie("Visit");if(visit != null){   var date = new Date();   date.setTime(date.getTime() - 2*1000);   document.cookie = name + "=" + value + ";path=/; expires=" + date.toGMTString();}}function checkVisit(hours){setCookie("Visit","true",hours);}