function mostrar_img(referencia_img) {
		var img_grande = referencia_img.getAttribute("href");
		var placeholder = document.getElementById("placeholder");
		placeholder.setAttribute("src","../img/empreendimentos/bg_galeria.jpg");
		placeholder.setAttribute("src",img_grande);
		
		if (referencia_img.getAttribute("title")) {
			var text = whichpic.getAttribute("title");
			placeholder.setAttribute("title",text);
			placeholder.setAttribute("alt",text);
		  } else {
			var text = "";
		  }
		
		return false;
}

function prepareGallery() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("ul_miniaturas")) return false;
  var gallery = document.getElementById("ul_miniaturas");
  var links = gallery.getElementsByTagName("a");
  for ( var i=0; i < links.length; i++) {
    links[i].onclick = function() {
      return mostrar_img(this);
	}
    links[i].onkeypress = links[i].onclick;
  }
  var li_container = gallery.getElementsByTagName("li");
  for ( var i=0;  i < li_container.length; i++) {
	  	li_container[i].onmouseover = function() {
			this.className="li_over";
		}
		li_container[i].onmouseout = function() {
			this.className="li_out";
		}
  }
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

addLoadEvent(prepareGallery);