text: $.fn.extend({
  	jselect:function(){
  		return $(this).each(function(){
  			var width = this.style.width;//因为ff取不到auto
  			$(this).after("<input type=\"hidden\" /><div class='jslct'><div class='jslct_t'><em></em></div><dl></dl></div>");
  			var ipt = $(this).next("input");
  			var lst = ipt.next("div");
  			var itms = $("dl",lst);
  			var itm;
  			var opt = $("option",$(this));
  			var opts = $("option:selected",$(this));
  			var opts_index = opt.index(opts);
  			var em = $("em",lst);
  			var fn_change=$(this).attr("onchange");
  			if(width!=""){lst.css("width",$(this).css("width"));em.css("width","100%");};
  			ipt.attr("name",$(this).attr("name"));
  			em.text($("option:selected",$(this)).text());
  			opt.each(function(i){
  				itms.append("<dd></dd>");
  				itm = $("dd",itms);
  				var dd = itm.eq(i);
  				dd.attr("val",$(this).val()).text($(this).text());
  			});
  			itm.eq(0).addClass("noborder")
  			itm.eq(opts_index).addClass("jslcted");
  			$(this).remove();
  			lst.hover(function(){$(this).addClass("jslct_hover");return false},function(){$(this).removeClass("jslct_hover");return false});
  			itm.hover(function(){$(this).addClass("hover")},function(){$(this).removeClass("hover")});
  			itm.width(itms.width()+0);
  			itms.css({width:itms.width(),"overflow-x":"hidden","overflow-y":"auto"});
  			lst.click(function(){lstshow();});
  			$(document).mouseup(function(){lsthide();});
  			itm.click(function(){
  							   if(fn_change!=null){(eval(fn_change))();}
  							   itm.removeClass("jslcted");
  							   $(this).addClass("jslcted");
  							   em.text($(this).text());
  							   ipt.val($(this).attr("val"));
  							   lsthide();
  							   return false;
  							   })
  			function lstshow(){
  					var maxheight =$(document).height()-200;
  					itms.css({height:"auto"});
  					maxheight = itms.height()>maxheight?maxheight:"auto";
  					itms.css({height:maxheight});
  					itms.show();
  					lst.css("z-index","1000")
  			};
  			function lsthide(){
  					$(".jslct dl").hide();
  					$(".jslct").css("z-index","0")
  			};
  		});	
  	}						
  });
   
  $(function(){
  	$(".jj").jselect();
  });
  