var ie4 = (document.all)? true:false
var W3DOM = (document.getElementById)?((ie4)?false:true):false
var Vbrowser = (ie4||W3DOM)

img1=new Image()
img1.src="../images/fold.gif"
img2=new Image()
img2.src="../images/open.gif"

Carpetas=new Array;

function ShowHide(nombre, nivel) {
	if (!Vbrowser) return;
	
	capa=((ie4) ? document.all(nombre) : document.getElementById(nombre));
	
	if (capa.style.display=="")
		CambiarEstado(nombre, "none", img1.src); //ocultar	
	else {
		CambiarEstado(Carpetas[nivel], "none", img1.src);
		Carpetas[nivel]=nombre;
		CambiarEstado(nombre, "", img2.src); //mostrar
	}
}

function CambiarEstado(nombre, display, imagen) {
	if ((nombre=="") || (nombre==null)) return;

	capa=((ie4) ? document.all(nombre) : document.getElementById(nombre));
	
	capa.style.display=display;

//	document.images("img_" + nombre) = imagen;
	img=((ie4) ? document.all("img_" + nombre) : document.getElementById("img_" + nombre)); 
	img.src=imagen;

}


function fuera(x) {
	if (x.blur) x.blur();
}



// -----------------------


// Determine browser and version.

function Browser() {

  var ua, s, i;

  this.isIE    = false;  // Internet Explorer
  this.isNS    = false;  // Netscape
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var browser = new Browser();

// Global variable for tracking the currently active button.

var activeButton = null;

// Capture mouse clicks on the page so any active button can be
// deactivated.
/*
if (browser.isIE)
  document.onmousedown = pageMousedown;
if (browser.isNS)
  document.addEventListener("mousedown", pageMousedown, true);
*/
function pageMousedown(event) {

  var el;

  // If there is no active menu, exit.

  if (!activeButton)
    return;

  // Find the element that was clicked on.

  if (browser.isIE)
    el = window.event.srcElement;
  if (browser.isNS)
    el = (event.target.className ? event.target : event.target.parentNode);

  // If the active button was clicked on, exit.

  if (el == activeButton)
    return;

  // If the element clicked on was not a menu button or item, close the
  // active menu.

  if (el.className != "menuButton"  && el.className != "menuItem" &&
      el.className != "menuItemSep" && el.className != "menu")
    resetButton(activeButton);
}

function buttonClick(button) {

  // Blur focus from the link to remove that annoying outline.

  button.blur();

  // Associate the named menu to this button if not already done.

  if (!button.menu) {
		var menuName;
		menuName=button.getAttribute("subMenu");
    button.menu = document.getElementById(menuName);
	}
  // Reset the currently active button, if any.

  if (activeButton && activeButton != button)
    resetButton(activeButton);

  // Toggle the button's state.

  if (button.isDepressed)
    resetButton(button);
  else
    depressButton(button);

  return false;
}

function buttonMouseover(button) {

  // If any other button menu is active, deactivate it and activate this one.
  // Note: if this button has no menu, leave the active menu alone.

  if (activeButton && activeButton != button) {
    resetButton(activeButton);

      buttonClick(button);
  }
}

function depressButton(button) {

  var w, dw, x, y;

  // Change the button's style class to make it look like it's depressed.

  button.className = "menuButtonActive";

  // For IE, set an explicit width on the first menu item. This will
  // cause link hovers to work on all the menu's items even when the
  // cursor is not over the link's text.

  if (browser.isIE && !button.menu.firstChild.style.width) {
    w = button.menu.firstChild.offsetWidth;
    button.menu.firstChild.style.width = w + "px";

		//poner los separadores bien. El metodo original no funcionaba en IE5    
    arr=button.menu.getElementsByTagName("div");
    for (var i = 0; i < arr.length; i++) { 
			arr[i].style.width=w + "px";
			arr[i].style.height="2px";
		}


    
/*
    dw = button.menu.firstChild.offsetWidth - w;
    w -= dw;
    button.menu.firstChild.style.width = w + "px";
*/
  }

  // Position the associated drop down menu under the button and
  // show it. Note that the position must be adjusted according to
  // browser, styling and positioning.

  x = getPageOffsetLeft(button);
  y = getPageOffsetTop(button) + button.offsetHeight;
  if (browser.isIE) {
    x -= 9;
    y += 1;
  } else {
		y += 3;
  }
  
  if (browser.isNS && browser.version < 6.1)
    y--;

  // Position and show the menu.
	
		x= x + (button.offsetWidth-120)/2

  button.menu.style.left = x + "px";
  button.menu.style.top  = "90px";
  button.menu.style.visibility = "visible";

  // Set button state and let the world know which button is
  // active.

  button.isDepressed = true;
  activeButton = button;
}

function resetButton(button) {

  // Restore the button's style class.

  button.className = "menuButton";

  // Hide the button's menu.

  if (button.menu)
    button.menu.style.visibility = "hidden";

  // Set button state and clear active menu global.

  button.isDepressed = false;
  activeButton = null;
}

function getPageOffsetLeft(el) {

  // Return the true x coordinate of an element relative to the page.

  return el.offsetLeft + (el.offsetParent ? getPageOffsetLeft(el.offsetParent) : 0);
}

function getPageOffsetTop(el) {

  // Return the true y coordinate of an element relative to the page.

  return el.offsetTop + (el.offsetParent ? getPageOffsetTop(el.offsetParent) : 0);
}