function slideMenu (myidoption, treeFrame)
	       		{
	       			var returnTreeFrame
	       			switch (treeFrame){
						case myidoption :
							hide_options (document.getElementById (myidoption));
							returnTreeFrame = '';
							break;
						case '' :
							hide_options (document.getElementById (myidoption));
							returnTreeFrame = myidoption;
							break;
						default : 
							hide_options (document.getElementById (treeFrame));
							hide_options (document.getElementById (myidoption));
							returnTreeFrame = myidoption;							 
						}
						return (returnTreeFrame);
	       		}	       	
	       	
	  	    function hide_options (myidoption)
          {
				if (myidoption.style.display =='block')
				{myidoption.style.display='none';}
			    else 
				{myidoption.style.display='block';}        		
			 }