function check()
{
    if (login.username.value=="") 
		alert("请输入用户名！");
	else if (login.pwd.value=="") 
		alert("请输入登录密码！");
	else
		login.submit();
}

function go(formobject)
{
if (formobject.options[formobject.selectedIndex].value!="")
{
window.open(formobject.options[formobject.selectedIndex].value)
}
}
function openwin(page,size)
{
window.open(page,"newuser","toolbar=no,location=no,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=no,"+ size);
}                                                                                          
function research_onsubmit() {
 if(document.research.R1[0].checked==false &&document.research.R1[1].checked==false&&document.research.R1[2].checked==false&&document.research.R1[3].checked==false&&document.research.R1[4].checked==false&&document.research.R1[5].checked==false)
  {
    alert("请选择房屋类型！")
return false
   }
   if(document.research.R2[0].checked==false &&document.research.R2[1].checked==false&&document.research.R2[2].checked==false&&document.research.R2[3].checked==false)
     {
alert("请选择租售方式！")
return false
   }

 }