function FrontPage_Form1_Validator()
{  
  if(document.userinfo.username.value.length < 1)
  {
    alert("请填姓名！");
    document.userinfo.username.focus();
    return (false);
  }
  if(document.userinfo.phone.value.length < 1)
  {
    alert("请填写联系电话！");
    document.userinfo.phone.focus();
    return (false);
  }
  if (document.userinfo.explain.value.length > 250)
  {
    alert("您的附加说明太长了！");
    document.userinfo.explain.focus();
    return (false);
  }
  return (true);
}

function change_button()
{
	document.userinfo.submit_1.disabled=true;
	document.userinfo.submit_2.disabled=true;
	for(i=1;i<=secs;i++)
	{
		window.setTimeout("update(" + i + ")", i * 1000);
	}
}


function showsize(house_model)
{
     var startpos = document.userinfo.houseinfo.value.indexOf(house_model);
     var endpos = document.userinfo.houseinfo.value.indexOf(";",startpos);
     
     if(endpos < 0) endpos = document.all.houseinfo.value.length ;
	 var house_number = document.userinfo.houseinfo.value.substring(startpos,endpos).split('|')[1].split(',');
	//document.userinfo.housenumber = null;
	document.userinfo.housenumber.length = 0;
	for(var i = 0 ; i < house_number.length ; i++)
	{
		document.userinfo.housenumber.length++;
		document.userinfo.housenumber.options[document.userinfo.housenumber.length - 1].text = house_number[i];
		document.userinfo.housenumber.options[document.userinfo.housenumber.length - 1].value = house_number[i];

	}
}