function checkForm()
{

	if(document.updata.userfile.value=="")
	{
		alert("please input upload picture!");
		document.updata.userfile.focus();
		return false;
	}

	if(document.updata.u_name.value=="")
	{
		alert("please input truck name!");
		document.updata.u_name.focus();
		return false;
	}
	if(document.updata.description.value=="")
	{
		alert("please input description!");
		document.updata.description.focus();
		return false;
	}


	return true;

}

function checkFormTalk()
{

	if(document.user_talk.u_name.value=="")
	{
		alert("please input truck name!");
		document.user_talk.u_name.focus();
		return false;
	}
	if(document.user_talk.description.value=="")
	{
		alert("please input description!");
		document.user_talk.description.focus();
		return false;
	}


	return true;

}

function checkFormEdit()
{

	if(document.updata.u_name.value=="")
	{
		alert("please input truck name!");
		document.updata.u_name.focus();
		return false;
	}
	if(document.updata.description.value=="")
	{
		alert("please input description!");
		document.updata.description.focus();
		return false;
	}


	return true;

}