<div id="cover" style="position:relative;left: 0;top: 0;height:0;width:0;display:none;background:gray;z-index: 1000;filter:alpha(opacity=30);">
</div>
    <div id="cover_msg" style="display:none;position:absolute;left:0;top:0;height:100;width:200;background:white;z-index: 1001;">正在导入，请稍后...</div>

var $cover = $J("#cover");
var $cover_msg = $J("#cover_msg");
function basedataMgtCheckBasedata() {
    divShow("正在导入及计算数据问题，请稍后......");
    $J.post("dataReportMgt_dataReportMgtSaveAdd.action", {
        "reportTaskVO.id" : $J('#reportTaskVOId').val(),
        "ReportTaskFileVOStrings":$J("#fileIds").val(),
        "reportTaskStatus" : 1
    }, function() {
        divHide();
        alert("导入完成");
        $J('#mytabs').tabs('add', {
            title : '2.数据核查',
            content : "<div id='problemData' style='width: 100%; height: 700px;'></div>",
            closable : false
        });
    });
}
function divShow(msg){
    $cover.width($J("body").width());
    $cover.height($J("body").height());
    $cover_msg.css("left",$J("body").width()/2-100);
    $cover_msg.css("top",$J("body").height()/2-50);
    $cover_msg.text(msg);
        $cover.show();
        $cover_msg.show();
}
function divHide(){
    if($cover.is(":visible")){
        $cover.hide();
    }
    if($cover_msg.is(":visible")){
        $cover_msg.hide();
    }
}