// JavaScript Document

    function createTarget(t){
    document.frm.txtusuario.value = '';
    document.frm.txtsenha.value = '';
    if (document.frm.txtu.value.length < 4)
       {
       alert ('O campo USUÁRIO deve possuir, pelo menos 4 caracteres.');
       document.frm.txtu.focus();
       return false;
       }
    else if (document.frm.txts.value.length < 4)
       {
       alert ('O campo Senha deve possuir, pelo menos 4 caracteres.');
       document.frm.txts.focus();
       return false;
       }
    else 
       {
       document.frm.txtusuario.value=document.frm.txtu.value;
       document.frm.txtu.value='';
       document.frm.txtsenha.value=document.frm.txts.value;
       document.frm.txts.value='';
       window.open('',t,'status=yes,scrollbars=no,width=' + (screen.availWidth - 10) + ',height=' + (screen.availHeight - 60) + ',top=0,left=0');
       return true;
       }
}