sessionStorage 刷新 传值消失

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');}只需对参数进行判断不为空就行