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下拉列表单有关问题

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Release: 2016-06-13 10:03:35
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下拉列表单问题
MONETARY_UNIT是一个下拉列表单的ID,我这样写他没反应 。我把我的下拉表单的程序也帖上来。麻烦帮我看一下。 我这个已初始值为JPY了,应该一打开页面就是只读,但没用。
if($("#MONETARY_UNIT").val()==JPY)
{
("#ss").addclass("readonly")

}


function monetary_unit()
{
echo '';
$monetary_unit1=getmontary_unit();//从数据库中得到
  foreach($monetary_unit1 as $k=>$v)
{

echo '';

  }
}

------解决方案--------------------
if($("#MONETARY_UNIT").val()=='JPY') 

("#ss").addclass("readonly") 


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