// JavaScript Document
function checkData()
{
	if(document.getElementById('loginname').value=='')
	{
		document.getElementById('loginname').focus();
		alert('请输入帐号');
		return false;
	}
	if(document.getElementById('loginpwd').value=='')
	{
		document.getElementById('loginpwd').focus();
		alert('请输入密码');
		return false;
	}
	if(document.getElementById('surCode').value=='')
	{
		document.getElementById('surCode').focus();
		alert('请输入验证码');
		return false;
	}
	else
	{
		return true;
	}
}