function busca(direct,pagina)
{
 if(direct == "next") {
  pagina++;
  document.getElementById("pag").value = pagina;
 } else if(direct == "prev") {
  pagina--;
  document.getElementById("pag").value = pagina;
 }

 var registros = Number(5)
 var total = Number(pagina) + registros;

 if(document.getElementById("pag").value > 0) {
  document.getElementById("uparrow").style.visibility = "visible";
 } else {
  document.getElementById("uparrow").style.visibility = "hidden";
 }

 if(total == document.getElementById("max").value) {
  document.getElementById("downarrow").style.visibility = "hidden";
 } else if(document.getElementById("max").value < registros) {
  document.getElementById("downarrow").style.visibility = "hidden";
 } else {
  document.getElementById("downarrow").style.visibility = "visible";
 }

 var pag = document.getElementById("pag").value;
 var xmlHttp = new XHConn();
 var fnWhenDone = function (oXML)
 {
  document.getElementById("divProyectos").innerHTML = oXML.responseText;
 }
 xmlHttp.connect("../html/proyHome.php", "POST", "pagina="+pagina+"&pg="+pag, fnWhenDone);
}