function showLoginForm() { 
 //if (Browser.Engine.trident) {
  //return true;
  //}
  if (!winFormLogin) {
  winFormLogin=new StickyWin.Modal({content: $('login-form'), closeClassName: 'close-block', useIframeShim: false});
  } 
  

  winFormLogin.show();   
  winFormLogin.pin(true);
  return false;
 }

 function hideLoginForm() {
  winFormLogin.hide();
 }

 var winFormLogin=false;