function MM_preloadImages() { 
  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 scroll(message_loop)
{
var messages = new Array();
messages[0] = "Uma ponte luso-irlandesa.";
messages[1] = "Um espaço informativo.";
messages[2] = "Uma plataforma de trabalho.";
messages[3] = "Um acervo de imagens.";
messages[4] = "Um universo crítico.";
messages[5] = "Uma ligação directa ao mundo lusófono.";
messages[6] = "LPDublin - um site de portas abertas.";



if(message_loop >= messages.length)
{
message_loop = 0;
}
var old_value = window.document.scroll_form.banner.value;
var new_value;
var random = Math.floor(Math.random() * messages[message_loop].length);
var change_letter = messages[message_loop].charAt(random);
if(old_value == messages[message_loop])
{
message_loop++;
setTimeout("scroll("+message_loop+")",4000);
return;
}
if(change_letter == old_value.charAt(random))
{
scroll(message_loop);
return;
}
var first_part = old_value.substring(0,random);
random++;
var last_part = old_value.substring(random,messages[message_loop].length);
var new_value = first_part + change_letter + last_part;
window.document.scroll_form.banner.value = new_value;
setTimeout("scroll("+message_loop+")",50);
}
				
  function generateRandSeq(len)
  {
	  var i, seq = "";
	  var letras = "abCdefGhIjlmnpQrsTuvXz123456789";
	  for (i = 1; i <= len; i = i + 1) {
	  
			seq += letras.charAt(Math.floor(Math.random()*(letras.length-1-0+1))); 
	  }
	  return seq;
  }