下拉列表选择

Question

http://expert.csdn.net/Expert/topic/1687/1687993.xml?temp=.4326746
一定有你想要的！

Answer 1

两个下拉菜单联动的例子。<SCRIPT language="JavaScript"> 
function setcity()
{ 
switch (document.regirst.Select5.value)
{
case '0' : 
var labels = new Array("请选择城市"); 
var values = new Array("0"); 
break; 
case '北京' : 
var labels = new Array("北京"); 
var values = new Array("北"); 
break; 
case '上海' : 
var labels = new Array("上海"); 
var values = new Array("上海"); 
break; 
case '河南' : 
var labels = new Array("郑州","开封","洛阳","平顶山","焦作","鹤壁","新乡","安阳","濮阳","许昌","漯河","三门峡","商丘","周口","驻马店","信阳","济源","南阳"); 
var values = new Array("郑州","开封","洛阳","平顶山","焦作","鹤壁","新乡","安阳","濮阳","许昌","漯河","三门峡","商丘","周口","驻马店","信阳","济源","南阳"); 
break; 
case '安徽' : 
var labels = new Array("合肥","淮南","淮北","芜湖","铜陵","蚌埠","马鞍山","安庆","黄山","宿州","滁州","巢湖","宣城","池州","六安","阜阳","毫州"); 
var values = new Array("合肥","淮南","淮北","芜湖","铜陵","蚌埠","马鞍山","安庆","黄山","宿州","滁州","巢湖","宣城","池州","六安","阜阳","毫州"); 
break; 
}document.regirst.Select6.options.length = 0; 
for(var i = 0; i < labels.length; i++) { 
document.regirst.Select6.add(document.createElement("OPTION")); 
document.regirst.Select6.options[i].text=labels[i]; 
document.regirst.Select6.options[i].value=values[i]; 
} 
document.regirst.Select6.selectedIndex = 5; 
} 
</script>
<form name="regirst" method="post">
<select name="Select5" id="Select5" onchange="setcity()" size="1">
<option selected="selected" value="0">请选择省份</option>
<option value="河南">河南</option>
<option value="安徽">安徽</option>
<option value="北京">北京</option>
</select>
<select name="Select6" id="Select6">
<option selected="selected" value="0">请选择城市</option>
</select>*</TD>
</form>

Answer 2

<select name="A_Face" id="朝向" style="width:130">
               <option value="东" <%if(A_Face.equals("东"))out.print("selected");%>>东
   </option>
   <option value="东南" <%if(A_Face.equals("东南"))out.print("selected");%>>东南
   </option>
  <option value="南" <%if(A_Face.equals("南"))out.print("selected");%>>南</option>
                      <option value="西南" <%if(A_Face.equals("西南"))out.print("selected");%>>西南</option>
                      <option value="西" <%if(A_Face.equals("西"))out.print("selected");%>>西</option>
                      <option value="西北" <%if(A_Face.equals("西北"))out.print("selected");%>>西北</option>
                      <option value="北" <%if(A_Face.equals("北"))out.print("selected");%>>北</option>
                      <option value="东北" <%if(A_Face.equals("东北"))out.print("selected");%>>东北</option>
                      <option value="东西" <%if(A_Face.equals("东西"))out.print("selected");%>>东西</option>
  <option value="南北" <%if(A_Face.equals("南北"))out.print("selected");%>>南北</option>
   <option value="中" <%if(A_Face.equals("中"))out.print("selected");%>>中</option>
                    </select>