function showhide(what){
		if (document.all){
			if(document.all[what].style.display == 'none'){
	        	document.all[what].style.display = '';
		    } else {
    		    document.all[what].style.display = 'none';
		    }
			return false;
	   } else if (document.getElementById){
		    if(document.getElementById(what).style.display == 'none'){
	 	       document.getElementById(what).style.display = 'block';
		    } else {
		       document.getElementById(what).style.display = 'none';
		    }
			return false;
	   }
	}