Event.observe(window, 'load',function() { 
				var searchStr = 'span.dev';
				var results = $$(searchStr);
				results.each(function(elem){
				elem.hide();
				});
				$('dev0').show();
				}
			);
			
			var devc=1;
			function dev(){
				var searchStr = 'span.dev';
				var results = $$(searchStr);
				results.each(function(elem){
				elem.hide();
				});
				if(devc<cdev){$('dev'+devc).show();
				devc++;
				}else{
				$('dev0').show();
				devc=1;
				}
			}