function sendMessage(ch_idx,station,ptype,group_idx){
	var pageURI = "http://www.vercoop.com/external/msgBtnPopup.html?ch_idx="+ch_idx+"&station="+station+"&ptype="+ptype+"&group_idx="+group_idx;
	window.open(pageURI,'_blank','width=470,height=540,toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no');
}