//ChangeDate function

function changeDate(sTime, callback, sesh_name, sesh_id, f1, f2) {
	var params = {};
	params['start'] = sTime;
	params['callback'] = callback;
	
	if(sesh_name) params[sesh_name] = sesh_id; 
	var qs = "";
	for(var i in params) qs += escape(i) + "=" + escape(params[i]) + "&";
	OpenPopWin("startDate","/calendar.php?" + qs, 300, 220, 0, 0);
}


//OpenPopWin function

 var popWin = Array(20);
 var winOpened = Array(20);
 function OpenPopWin(winName,url,w,h,st,sc) {
  if(winOpened[winName] == 1 && popWin[winName].closed == false) {
   popWin[winName].close();
  }
  if(navigator.appVersion.indexOf("Mac") != -1 && st == 1) h = h + 15;
  if (window.screen) {
    var sw = screen.availWidth;
    if(sw < w) w = sw - 20;
    var sh = screen.availHeight;
    if(sh < h) h = sh - 40;
    popWin[winName] = window.open(url,winName,'width=' + w + ',height=' + h + ',scrollbars=' + sc  + ',status=' + st + ',left=' + ((sw - w - 10) * .5) + ',top=' + ((sh - h - 30) * .5));
  }
  else {
    popWin[winName] = window.open(url,winName,'width=' + w + ',height=' + h + ',scrollbars=' + sc + ',status=' + st );
  }
  winOpened[winName] = 1;
 }