function openJoinPage(goodsId,username)
{       // todo
	//var url=join_url+"?goods_id=";
	//url=url+goodsId+'&username='+username;
	//window.open(url);

        if (username){
          var url=join_url+"?goods_id="+goodsId+'&username='+username+'&from_site_id='+from_site_id+'&source_page='+source_page;
        }else{
          var url=join_url+"?goods_id="+goodsId+'&from_site_id='+from_site_id+'&source_page='+source_page;
        }
        window.open(url);
}

function openNewJoinPage(goodsId,username)
{
        var url=join_url+"?goods_id=";
        url=url+goodsId+'&username='+username+'&from_site_id='+from_site_id+'&source_page='+source_page;
        //window.open(url);
        window.open(url, 'JoinPage', 'location = yes, resizable=yes, toolbar=yes, scrollbars=yes, personalbar=yes, menubar=yes, width=850, height=685');
}

function gotoJoinPage(goodsId,username)
{   
	var url=join_url+"?goods_id=";
	url=url+goodsId+'&username='+username+'&from_site_id='+from_site_id+'&source_page='+source_page;
	document.location= url;
}