function show_DropDown(){
		document.getElementById("S_T").style.display='block';
		document.getElementById("S_D").style.display='block';
		document.getElementById("S_C").style.display='block';
		document.getElementById("B_KEISTI").style.display='none';
	}

	function bookmark(){
		var title="title"
		var url="http://www.domain.com"

		if (window.sidebar) window.sidebar.addPanel(title, url,"");

		else if( window.opera && window.print )
		{
		var mbm = document.createElement('a');
		mbm.setAttribute('rel','sidebar');
		mbm.setAttribute('href',url);
		mbm.setAttribute('title',title);
		mbm.click();
		}

		else if( document.all ) window.external.AddFavorite( url, title);

	}