function getID1()
{
var ID1=document.getElementById("ID1");
 {for(var i=0;i<ID1.length;i++)

   if(ID1.options[i].selected)
   { 
   return ID1.options[i].value;
   }
 }
}


function hasDianti1()
{
 var dianTi1=document.getElementById("dianTi1");
  for(var i=0;i<dianTi1.length;i++)
   {
     if(dianTi1[i].checked)
     return dianTi1[i].value ;
   }
}

function check1()
{
  var emsg = "";
 var money=document.getElementById("money").value;  
  if(money=="")
  { 
    emsg="请输入售房金额!\n";
  }
  else//数据合法性校验
  {
     var patrn=/^\d{1,20}.{0,1}\d{0,2}$/;
     if (!patrn.exec(money)) 
     {
      emsg="请输入数字！";
     }
  }
 return emsg;
}

//计算并显示
function cal1()
{ 
  var result = document.getElementById("Result1");// .Form1.Result;
  var emsg = check1();
  if(emsg!="")
  { 
   alert(emsg) ;
   return false ;
  }
  var Tax ;
 var money=document.getElementById("money").value;  
  money = parseFloat(money);
  var i = (hasDianti1()=="1");
  var j=getID1();
  //是业主还是开发建设单位
  if(i)//有电梯
  {
      switch (j)
     {
      case "购房人":
      Tax=money*0.02;
      result.value=Tax;
      break;
      case "售房单位":
      Tax=money*0.3;
      result.value=Tax;
      break;
     }
  }
  else//没有电梯
  {
      switch (j)
     {
      case "购房人":
      Tax=money*0.02;
      result.value=Tax;
      break;
      case "售房单位":
      Tax=money*0.2;
      result.value=Tax;
      break;
     }
  }
}