function show( blockId ) {
	blockObj = document.getElementById( blockId );
	blockObj.style.display = 'block';
}

function hide( blockId ) {
	blockObj = document.getElementById( blockId );
	blockObj.style.display = 'none';
}

function toggle( blockId ) {
	blockObj = document.getElementById( blockId );
	if (blockObj.style.display == 'none')
	{
		blockObj.style.display = 'block';
	}
	else
	{
		blockObj.style.display = 'none';
	}
}

		function set_class(obj, cname)
		{
			 document.getElementById( obj ).className= cname;
		}
		function hide_all() 
		{
			 hide('title01');
			 set_class('a_title01',"");
			 hide('title02');
			 set_class('a_title02',"");
			 hide('title03');
			 set_class('a_title03',"");
			 hide('title04');
			 set_class('a_title04',"");
			 hide('title05');
			 set_class('a_title05',"");
			 hide('title06');
			 set_class('a_title06',"");
			 hide('title07');
			 set_class('a_title07',"");
			 

					}
		
		function display(obj)
		{
			hide_all();
			show(obj);
		    set_class("a_"+obj,"here");

		}