function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

function openPerfil(login) {
    var url;
    
    if (login) { 
        url = "/aluno/perfil.php?login=" + login;
    } else {
        url = "/aluno/perfil.php";
    }
    window.open(url,"perfil",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,menubar=no,width=448,height=540');
}

function openPerfilTurma(grp,crs) {
    var url;
    url = "/aluno/turma_perfil.php?grp=" + grp + "&crs=" + crs;
    
    window.open(url,"perfilturma",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,menubar=no,width=446,height=540');
}

function openCurso(crs) {
    var url;
    
    url = "/aluno/perfil_curso.php?crs=" + crs;
    window.open(url,"perfil_curso",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,menubar=no,width=446,height=540');
}

function openPagina(login,usr_pgs) {
    var url;
    
    url = "/aluno/pagina.php?login=" + login + "&usr_pgs=" + usr_pgs;
    
    window.open(url,"pagina",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,menubar=no,width=640,height=480');
}

function openChat(login,room) {
    var url;
    
    url = "/cgi-bin/chat/chat2.cgi?action=login&name=" + login + "&room=" + room;
    
    window.open(url,"pagina",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,menubar=no,width=640,height=480');
}

function openJanela(url,width,height) {
    if (!width) width = 540;
    if (!height) height = 400;
    window.open(url,"janela",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,menubar=no,width='+ width +',height=' + height);
}

// Email Validation. Written by PerlScriptsJavaScripts.com
function check_email(e) {
    ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";

    for(i=0; i < e.length ;i++){
        if(ok.indexOf(e.charAt(i))<0){ 
            return (false);
        }   
    } 

    if (document.images) {
        re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
        re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
        if (!e.match(re) && e.match(re_two)) {
            return (-1);        
        } 
    }
}

// Email Validation. Written by PerlScriptsJavaScripts.com
function check_number(e) {
    ok = "1234567890";

    for(i=0; i < e.length ;i++){
        if(ok.indexOf(e.charAt(i))<0){ 
            return false;
        }   
    } 

    return true;
}

// Login Validation. Written by PerlScriptsJavaScripts.com
function check_login(e) {
    ok = "1234567890qwertyuiopasdfghjklzxcvbnm-_QWERTYUIOPASDFGHJKLZXCVBNM";

    for(i=0; i < e.length ;i++){
        if(ok.indexOf(e.charAt(i))<0){ 
            return false;
        }   
    } 

    return true;
}