///显示DIV内容 url：文件路径   pageDivName 页面DIV名称
function showDivContent(url,pageDivName){
    var myAjax = new Ajax.Request(url,{method:'get',onComplete:function(response){ document.getElementById(pageDivName).innerHTML = response.responseText;if(response.responseText.length==0) document.getElementById(pageDivName).style.display = "none";; }});
    
}