function openLoadingIcon(){
$("#dataLoading").css("display","block");
$("#absoluteDiv").css("display","block");
$("#dataLoading").css("left",(document.body.clientWidth/2)-70);
$("#dataLoading").css("top",(document.body.clientHeight/2)-70);
}
请求完成后调用隐藏
function closeLoadingIcon(){
$("#dataLoading").css("display","none");
$("#absoluteDiv").css("display","none");
}

document.getElementById("div的ID名").style.display="none";

$('#attachmentFrame').attr('src','${basePath}base/attachments/attachmentTableList.jsp?dataId='+customerId+'&tableName=CUSTOMER_INFO&readonly=0');

$("#attachmentDownId").css("display","none");

<iframe src="" name="attachmentFrame" id="attachmentFrame"
    scrolling="No"  border="0"  noresize="noresize" height="300px" width="100%" frameborder="no" framespacing="0"></iframe>