function OffOnDiv(NameDiv) {
			OffDiv('div_about_us');
		    OffDiv('div_cfc_database');
		    OffDiv('div_cfc_toolkit');
		    OffDiv('div_partnerships');
		    OffDiv('div_news');
		    OffDiv('div_site_guide');
		    OffDiv('div_home');
				if (NameDiv)
					 OnDiv(NameDiv);
				/*else
					 OnDiv('div_home');*/
		  } 
		function OutDiv() {
			OffOnDiv();
		}	
		function InDiv() {
			alert('1')
		}	
		function OffDiv(NameDiv) {
					 if (document.getElementById) { //NN6 ed Opera ed IE 6
					 		document.getElementById(NameDiv).style.visibility="hidden";
		        /*cambio la visibilità da visibile a invisibile con IE*/
		       }
		       else if (document.layers){ //NN4
		          document.layers[NameDiv].visibility="hide";
		       }
		       else if (document.all) { //IE 4
		         document.all[NameDiv].style.visibility="hidden";
					 }
		  } 
			
		function OnDiv(NameDiv) {
		    if (document.getElementById) {
		       document.getElementById(NameDiv).style.visibility="visible";
		    }
		    else if (document.layers){
		       document.layers[NameDiv].visibility="show";
		    }
		    else if (document.all) {
		      document.all[NameDiv].style.visibility="visible";
		    }
		  }