var URL="/SessionKeep.aspx";
var nowid=0;
//留言版
var gid=0;
function sessionfresh() {
	retrieveData("", URL);
	setTimeout("sessionfresh()",50000);
}
function retrieveData(rec, url) {
    var  now  =  new  Date();
	var pars = "ticks = " + now.getMinutes();
	var myAjax = new Ajax.Request(url,{method: "post", parameters: pars, onComplete: showRecord});
}
function showRecord(originalRequest) {
    var str=new String(originalRequest.responseText);
    try{
        //$("updatetimespan").innerHTML=str;
	}
	catch (e) {
	}
}
sessionfresh();