sessionStorage 存值出现刷新值消失

function clearTimeoutAll(call_name) {  sessionStorage.setItem("last_call", call_name);  console.log(call_name);  $("#orderkantip").hide();  for (var i = 0; i < timeouts.length; i++) {    clearTimeout(timeouts[i]);  }  timeouts = [];  /*    setTimeout("autoClickMaue()",5000);  */}function load_history_overviw(start, end) {  clearTimeoutAll(arguments.callee.name);  $('#kanbanID').empty();  if (start != null) {    sessionStorage.setItem("t0", start);    sessionStorage.setItem("t1", end);  }  $('#kanbanID').load('productStatus/twoDetail.jsp');}只需对参数进行非空判断即可