// JavaScript Document
function runspf(obj){
unitprice=parseFloat(obj.unitprice.value);
unitearea=parseFloat(obj.unitearea.value);
 if (obj.comuse.value==1&&obj.comfirstornot.value==1) //第一次购买住宅
     {
	 obj.comexpenses.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.015+80;
	 //所需缴纳税费=契税（成交价*1.5%）+登记费（80元/套）
	 obj.comtax.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.015;//契税
	 obj.compoundage.value="无";
	 obj.comregister.value=80;
	 }else //两次以上购买
	   { 
	     if(obj.comuse.value==1&&obj.comfirstornot.value==2)
		   {
		    obj.comexpenses.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.03+80;
		   	 //所需缴纳税费=契税（成交价*3%）+登记费（80元/套）
			obj.comtax.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.03;//契税
	        obj.compoundage.value="无";
	        obj.comregister.value=80;
		   }
		}   
 if (obj.comuse.value==2) //购买非住宅
    {
	obj.comexpenses.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*(0.0035+0.03)+240;
	//所需缴纳税费=契税（成交价*3%）+交易手续费（成交价*0.35%）+登记费（240元/套）
	obj.comtax.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.03;//契税
	obj.compoundage.value=parseFloat(obj.unitprice.value)*parseFloat(obj.unitearea.value)*0.0035;
	obj.comregister.value=240;
	}
}