$(document).ready(
			function(){
						$("#butSearch").click(
										function(){
										var stValue = $("#drpSearchType").val() ;
										var postUrl = "" ;
										 switch(stValue)
											   {
												   case "c":
															postUrl = "http://search.eduman.com.cn/eduman-c.shtml" ;
												   break ;
												   case "n":
															postUrl = "http://search.eduman.com.cn/eduman-n.shtml" ;
												   break ;
												   case "d":
															postUrl = "http://search.eduman.com.cn/eduman-d.shtml" ;
												   break ;
												   case "a":
															postUrl = "http://search.eduman.com.cn/eduman-a.shtml" ;
												   break ;
												   default:
															postUrl = "http://search.eduman.com.cn/eduman-c.shtml" ;
												   break ;
											   }

												$("form").attr("action",postUrl) ;
												$("form").attr("target","_blank");
									}
			) ;
			}
		) ;