// JavaScript Document
//购买商品房（含全额集资建房）专项维修资金计算器
function runmaintain(obj)
{
  obj.maintainarea.value=parseFloat(obj.maintainarea.value);

//房屋所在地
  var distirct=getdistrict();
   if (document.form3.elevator.value ==1)//有电梯
   {
       obj.maintainsum.value=parseFloat(obj.maintainarea.value)*distirct*0.025;
   }
    else//无电梯
	{
       obj.maintainsum.value=parseFloat(obj.maintainarea.value)*distirct*0.02;
	}

}

function getdistrict()
{
  var a ;
  for(var i=0;i<document.form3.district.length;i++)
    {
      if(document.form3.district.options[i].selected) 
      {
         a = document.form3.district.options[i].value ;
          return a;
        }
    } 

}