function openLogin()
{
	var center = true;
	var width = 1000;
	var height = 700;
	var url = 'https://secure.svs-schoonmaak.nl/portal/';
	windowName = 'mainWindow';
	options = 'resizable=yes,scrollbars=yes,status=no,toolbar=no,location=no,width=';
	options += width.toString();
	options += ',height=';
	options += height.toString();
	var scrnH = (screen.height / 2) - (height / 2);
	var scrnW = (window.document.body.clientWidth / 2) - (width / 2);
	options += ',top=' + scrnH.toString();
	options += ',left=' + scrnW.toString();
	window.open(url, windowName, options);
}

var win= null;
function popWin(mypage,myname,w,h,scroll){
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars='+scroll+',';
      settings +='resizable=0';
  win=window.open(mypage,myname,settings);
  if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}