function main(insight) {
    if (typeof(insight.old_rebuildParamPanel) == "undefined") {
        insight.old_rebuildParamPanel = insight.rebuildParamPanel;
        insight.rebuildParamPanel = function() {
            this.old_rebuildParamPanel();
            addBtns(this);
        };
    }
}
//添加刷新按钮
function addBtns(insight) {
    var paramTable = insight.paramPanelObj.layoutTable;
    var i, cell, lastCell;
    for (i = 0; i < paramTable.rows.length; i++) {
        cell = paramTable.rows[i].insertCell(-1);
        if (i == paramTable.rows.length - 1) lastCell = cell;
    }
    //新建button，并把这个button加到最后一个参数后面
    var btnElem = document.createElement("input");
    btnElem.type = "button";
    btnElem.value = "刷新";
    btnElem.className = "queryview-toolbar-button";
    btnElem.style.background = "url(./img/button/button_bgicon_add.gif) no-repeat top right";
    btnElem.style.border = "1px solid #A1ACB9";
    btnElem.style.width = "70px";
    btnElem.style.height = "23px";
    btnElem.style.padding = "2px 0 0 0";
    btnElem.style.margin = "0 10px 0 10px";
    insight.addListener(btnElem, "click",
        function() {
            insight.doRefresh();
        }, this);
    lastCell.appendChild(btnElem);
}