function init_page() {
   init_dropdowns();
   init_ocultas();
   if ( getVariable('id') ) {
      div = 'Div_' + getVariable('id');
      switchDiv(div);
      }
}

function init_dropdowns() {
   var elts = document.getElementsByTagName('div');
   for (var i=0; i < elts.length; i++) {
      var e = elts[i];
      if (e.className == 'dropdown') {
         e.onmouseover = dropdown_on;
         e.onmouseout = dropdown_off;
      }
   }
}

function init_ocultas() {
   var elts = document.getElementsByTagName('div');
   for (var i=0; i < elts.length; i++) {
      var e = elts[i];
      if (e.className == 'event') {
      	if (e.id != 'list') {
      		e.style.display = 'none';
      	}
      }
   }
}

function ocultar() {
   var elts = document.getElementsByTagName('div');
   for (var i=0; i < elts.length; i++) {
      var e = elts[i];
      if (e.className == 'event') {
   		e.style.display = 'none';
      }
   }
}

function dropdown_on() {
   var t = this.getElementsByTagName('table')[0];
   t.style.display = 'block';
}

function dropdown_off() {
   var t = this.getElementsByTagName('table')[0];
   t.style.display = 'none';
}

function switchDiv(nombre) {
	ocultar();
	d = busca(nombre);
	if (d.style.display == 'none') {
		d.style.display = 'block';
	} else {
		d.style.display = 'none';
	}
}

function busca(nombre)
{
	if (document.layers) {
		obj = document.layers[nombre];
	} else if (document.all) {
		obj = document.all[nombre];
	} else if (document.getElementById) {
		obj = document.getElementById(nombre);
	}
	return obj;
}

function getVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
return false;
}