$(document).ready(function(){
  $("#a option").eq(0).attr("selected",true);
$("#b option").eq(0).attr("selected",true);
}); 



var oparrary = new Array();

oparrary[0] = $("option.qxz,option.a,option.b,option.c,option.d");
oparrary[1] = $("option.a");
oparrary[2] = $("option.b");
oparrary[3] = $("option.c");
oparrary[4] = $("option.d");

$("#a").change(function(){
//alert($("#a option"));
var seloption = $('#a option:selected');
if(seloption){
   var num = seloption.attr("value");
 
   $("#b option").remove();
   oparrary[num].appendTo('#b');
  
   $("#b option").eq(0).attr("selected","true");
}
});
$(".fund_search_btn").click(function(){
dizhi = $('#b option:selected').attr("value");
location.href(dizhi);
})