document.write("<iframe height='1' width='1' name='lfrm' style='display:none'></iframe>");
function chkplogin()
{
 var uname=document.plogin.puName.value;
 var upass=document.plogin.pPassword.value;
 
 if (uname.length==0)
    {
    alert("请输入用户名！");
    document.plogin.puName.focus();
    return false;
    }
  
  if (upass.length==0)
    {
    alert("请输入密码！");
    document.plogin.pPassword.focus();
    return false;
    }
}
function chkplogin1()
{
 var uname=document.plogin1.puName.value;
 var upass=document.plogin1.pPassword.value;
 
 if (uname.length==0)
    {
    alert("请输入用户名！");
    document.plogin1.puName.focus();
    return false;
    }
  
  if (upass.length==0)
    {
    alert("请输入密码！");
    document.plogin1.pPassword.focus();
    return false;
    }
}