// Heralsoft http://heralsoft.com

// Funciones javascript para mostrar un div de actividad

// basado en la libreria lightbox http://www.huddletogether.com/projects/lightbox2/

//





function insertOverlay(){

	// se inserta el div overlay al final del body

	var objBody = document.getElementsByTagName("body").item(0);

	var objOverlay = document.createElement("div");

	objOverlay.setAttribute('id','sOverlay');

	// se oculta el div

	objOverlay.style.display = 'none';

	// se sobreescribe el onclick

	objOverlay.onclick = function() { hideOverlay(); return false; }

	objBody.appendChild(objOverlay);



/*	// se inserta el div loading dentro del overlay

	var objLoading = document.createElement("div");

	objLoading.setAttribute('id','loading');

	objOverlay.appendChild(objLoading);



	// se inserta la imagen de indicacion de actividad

	var objLoadingImage = document.createElement("img");

	objLoadingImage.setAttribute('src', '/blog/images/loading.gif');

	objLoading.appendChild(objLoadingImage);*/

}





function showOverlay(){

	// insercion segura

	if ($('sOverlay')==null){

		insertOverlay();	

	}

	hideSelectBoxes();// se esconde las select para IE

	var arrayPageSize = getPageSize();

	// se redimensiona el div de overlay

    	$('sOverlay').style.height = arrayPageSize[1] +"px";

	new Effect.Appear('sOverlay', { duration: 0.2, from: 0.0, to: 0.8 });

	new Effect.Appear('sVentana', { duration: 0.2, from: 0.0, to: 1 });

}





function hideOverlay(){

	Element.hide('sOverlay', { duration: 0.2 });

	Element.hide('sVentana', { duration: 0.5 });



}







/* funciones de utilidad */



// oculta todas las selects ya que el explorer las muestra por encima

// del div de overlay

function hideSelectBoxes(){

	selects = document.getElementsByTagName("select");

	for (i = 0; i != selects.length; i++) {

		selects[i].style.visibility = "hidden";

	}

}



// Funcion "prestada" que retorna el tamaño del navegador en un array

// getPageSize()

// Returns array with page width, height and window width, height

// Core code from - quirksmode.org

// Edit for Firefox by pHaez

//

function getPageSize(){



	var xScroll, yScroll;



	if (window.innerHeight && window.scrollMaxY) {

		xScroll = document.body.scrollWidth;

		yScroll = window.innerHeight + window.scrollMaxY;

	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac

		xScroll = document.body.scrollWidth;

		yScroll = document.body.scrollHeight;

	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari

		xScroll = document.body.offsetWidth;

		yScroll = document.body.offsetHeight;

	}



	var windowWidth, windowHeight;

	if (self.innerHeight) {	// all except Explorer

		windowWidth = self.innerWidth;

		windowHeight = self.innerHeight;

	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode

		windowWidth = document.documentElement.clientWidth;

		windowHeight = document.documentElement.clientHeight;

	} else if (document.body) { // other Explorers

		windowWidth = document.body.clientWidth;

		windowHeight = document.body.clientHeight;

	}



	// for small pages with total height less then height of the viewport

	if(yScroll < windowHeight){

		pageHeight = windowHeight;

	} else {

		pageHeight = yScroll;

	}



	// for small pages with total width less then width of the viewport

	if(xScroll < windowWidth){

		pageWidth = windowWidth;

	} else {

		pageWidth = xScroll;

	}





	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)

	return arrayPageSize;

}