即席查询如何实现参数添加按钮并对日期参数进行判断？

function main(simpleReport, simpleReportContext) {
    if (simpleReport.__queryBtn) return;
    if (!simpleReport.paramPanelObj) return;
    //两个参数的名称
    var beginTimeName = '起始时间';
    var endTimeName = '结束时间';
    addBtn(simpleReport, beginTimeName, endTimeName);
    overrideInitParamPanel(simpleReport);
}
//添加按钮在参数之后
function addBtn(simpleReport, beginTimeName, endTimeName) {
    var paramPanelObj = simpleReport.paramPanelObj; //读取参数面板
    var beginDateParam = paramPanelObj.findParamByName(beginTimeName); //读参数开始日期
    var endDateParam = paramPanelObj.findParamByName(endTimeName); //读参数结束日期
    var beginDateParamId = beginDateParam && beginDateParam.id; //读参数开始日期ID
    var endDateParamId = endDateParam && endDateParam.id; //读参数结束日期ID
    bindRefreshCheck(simpleReport, beginDateParamId, endDateParamId, paramPanelObj);
    try {
        //获取参数面板表格
        var paramTable = simpleReport.paramPanelObj.layoutTable;
        var i, cell, lastCell;
        //在最后一个参数后面插入一个新的节点元素
        for (i = 0; i < paramTable.rows.length; i++) {
            cell = paramTable.rows[i].insertCell(-1);
            if (i == paramTable.rows.length - 1) lastCell = cell;
        }
        //创建按钮
        var queryBtn = document.createElement("button");
        queryBtn.innerText = " 查询 "; //如需要修必按钮风格，请自行实现
        queryBtn.className = "query-button";
        queryBtn.style.width = "70px";
        queryBtn.style.height = "25px";
        queryBtn.style.marginLeft = "30px";
        lastCell.appendChild(queryBtn);
        simpleReport.__queryBtn = queryBtn;
        //给按钮添加事件
        simpleReport.addListener(lastCell, "click",
            function() {
                simpleReport.refreshData();
            },
            this);
        var span = document.createElement("span");
        lastCell.appendChild(span);
        span.innerHTML = "  ";
        var exportBtn = document.createElement("button");
        exportBtn.innerText = " 导出 "; //如需要修必按钮风格，请自行实现
        exportBtn.className = "query-button";
        exportBtn.style.width = "70px";
        exportBtn.style.height = "25px";
        lastCell.appendChild(exportBtn);
        //给按钮添加事件
        simpleReport.addListener(exportBtn, "click",
            function() {
                //导出Excel方法
                simpleReport.doExportMenuCloseUp("EXCEL2007");
            },
            this);
    } catch (e) {
        alert('更新查询、导出按钮位置失败：' + e.message);
    }
}
//对日期的开始日期参数与结束日期参数之间的判断
function bindRefreshCheck(simpleReport, beginDateParamId, endDateParamId, paramPanelObj) {
    if (!beginDateParamId || !endDateParamId) {
        return;
    }
    if (simpleReport._old_refreshData) {
        return;
    }
    simpleReport._old_refreshData = simpleReport.refreshData;
    simpleReport.refreshData = function(refresh, noExecuteQuery, executeInMem) {
        if (!checkDateParamValue(beginDateParamId, endDateParamId, paramPanelObj)) {
            return;
        }
        simpleReport._old_refreshData(refresh, noExecuteQuery, executeInMem);
    };
}
function checkDateParamValue(beginDateParamId, endDateParamId, paramPanelObj) {
    var beginDateValue = paramPanelObj.getParamValue(beginDateParamId);
    var endDateValue = paramPanelObj.getParamValue(endDateParamId);
    if (!isValidDateParamValue(beginDateValue, endDateValue)) {
        alert('时间跨度不能超过一年!');
        return false;
    }
    return true;
}
function isValidDateParamValue(beginDateValue, endDateValue) {
    if (!beginDateValue || !endDateValue) {
        return false;
    }
    var beginTime = Date.parse(beginDateValue.replace(/-/g, '/'));
    var endTime = Date.parse(endDateValue.replace(/-/g, '/'));
    if (isNaN(beginTime) || isNaN(endTime) || beginTime >= endTime) {
        return false;
    }
    var twoDaySeconds = 365 * 24 * 3600; //一年以内
    if (((endTime - beginTime) / 1000) > twoDaySeconds) { // 时间跨度是否在一年以内
        return false;
    }
    return true;
}

function overrideInitParamPanel(simpleReport) {
    if (simpleReport._old_initParamPanel) {
        return;
    }
    simpleReport._old_initParamPanel = simpleReport.initParamPanel;
    simpleReport.initParamPanel = function(bizViewId, defaultParams, paramLayout, notSetDefaultValue) {
        simpleReport.__queryBtn = undefined;
        simpleReport._old_initParamPanel(bizViewId, defaultParams, paramLayout, notSetDefaultValue);
    };
}