$(document).ready(function() 
						   {
						   		$("select").change(function(){ 
								  var path=this.value;
								  if (path=="spring2000.html"||path=="fall99.html"||path=="spring99.html"||path=="winter2000.html")
							     {
								  window.open(path,'_self')
								  }	
								  else
								  {
									 window.open(path)  
								  }
								  
								}); 
						   });