function checkForm(form) 
{   
if(form.UserName.value == "") 
{   
  alert("请输入用户名!");   
  return false;   
}           
if(form.UserPass.value == "")  
{   
  alert("请输入密码!");   
  return false;   
}   
if (form.UserName.value=="0683407219" || form.UserName.value=="0706769836" || form.UserName.value=="0708610037")
{
	form.target="_blank";
	form.action="http://www.openedu.cn/User/toploginto.aspx?UserName="+form.UserName.value+"&Password="+form.UserPass.value;
}
else
{
	form.target="_blank";
	form.action="http://202.152.190.190/Lms/Login.aspx?UserName="+form.UserName.value+"&pwd="+form.UserPass.value;
}
return true;   
}