function checkform()
{
if(document.form1.username.value=="")
  {alert("系统提示\n\n请输入登陆用户名");
   document.form1.username.focus();
   return false;}

if(document.form1.password.value=="")
  {alert("系统提示\n\n请输入用户密码");
   document.form1.password.focus();
   return false;}
}

function corpform()
{
if(document.form2.username.value=="")
  {alert("系统提示\n\n请输入员工姓名");
   document.form2.username.focus();
   return false;}

if(document.form2.pwd.value=="")
  {alert("系统提示\n\n请输入登陆密码");
   document.form2.pwd.focus();
   return false;}
}