var Popups =
{
	closeLightBox: function()
	{
		this.hidePopup('light_box');
	},
	openLightBox: function()
	{
		this.showPopup('light_box');
	},
	closeSigninSignup: function()
	{
		this.hidePopup('signin_signup');
	},
	openSigninSignup: function()
	{
		this.showPopup('signin_signup');
  },

  hidePopup: function(elementId)
  {
    $(elementId).style.display = 'none';
    $('mask').style.display = 'none';

  },
  showPopup: function(elementId)
  {
    Element.show(elementId);
    Element.show('mask');
  }
}