function showMenu(blockName)
{
	if(document.getElementById(blockName).style.display=="none")
		document.getElementById(blockName).style.display="block";
	else
		document.getElementById(blockName).style.display="none";
}
function collapseMenu()
{
    document.getElementById("SW").style.display="none";
    document.getElementById("Fun").style.display="none";
    document.getElementById("CV").style.display="none";
}
function showOnly(blockName)
{
    collapseMenu();
    showMenu(blockName);
}