// Funciones para mantener la compatibilidad entre browsers

window.scrollY = function(obj) {
//Desplazamiento (Scroll) vertical de la pagina
	var result = 0;
	if (obj)
		topDocument = obj.document;
	else
		topDocument = document;
	if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		result = window.pageYOffset;
	} else if( topDocument.body && ( topDocument.body.scrollLeft || topDocument.body.scrollTop ) ) {
		//DOM compliant
		result = topDocument.body.scrollTop;
	} else if( topDocument.documentElement && ( topDocument.documentElement.scrollLeft || topDocument.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		result = topDocument.documentElement.scrollTop;
	}
	return result;
}

window.scrollX = function() {
//Desplazamiento (Scroll) horizontal de la pagina
	var result = 0;
	if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		result = window.pageXOffset;
	} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
		//DOM compliant
		result = document.body.scrollLeft;
	} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		result = document.documentElement.scrollLeft;
	} else {
		result = 0;
	}
	return result;
}

window.sizeY = function() {
	var result = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		result = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		result = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		result = document.body.clientHeight;
	}
	return result;
}

window.sizeX = function() {
	var result = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		result = window.innerWidth;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		result = document.documentElement.clientWidth;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		result = document.body.clientWidth;
	}
	return result;
}

function isChildOf(obj, target) {
//Devuelve true si target es child de obj
	while (target && (target.nodeName!='BODY') && (target.nodeName!='HTML') && (target!=obj))
		target = target.parentNode;
	return (target==obj)
}

function objsAreRelated(a, b) {
	var obja = a;
	var objb = b;
	var found = false;
	while (!found && objb && (objb.nodeName!='BODY') && (objb.nodeName!='HTML')) {
		while (!found && obja && (obja.nodeName!='BODY') && (obja.nodeName!='HTML')) {
			found = (obja == objb);
			obja = obja.parentNode;
		}
		if (!found) {
			objb = objb.parentNode;
			obja = a;
		}
	}
	return found;
}

function offsetTop(obj) {
	var curtop = 0;
	curtop = obj.offsetTop
	if (obj.offsetParent) {
		while (obj = obj.offsetParent)
			curtop += obj.offsetTop;
	}
	return curtop;
}

function offsetLeft(obj) {
	var curleft = 0;
	curleft = obj.offsetLeft
	if (obj.offsetParent) {
		while (obj = obj.offsetParent)
			curleft += obj.offsetLeft;
	}
	return curleft;
}

function heightObj(obj) {
	return obj.offsetHeight || obj.pixelHeight;
}

function widthObj(obj) {
	return obj.offsetWidth || obj.pixelWidth;
}

function mouseX(e) {
	// pos contains the mouse position relative to the document
	var pos = 0;
	if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		pos = e.pageX;
	}
	else if (e.clientX || e.clientY) 	{
		pos = e.clientX + scrollX();
	}
	return pos;
}
function mouseY(e) {
	// pos contains the mouse position relative to the document
	var pos = 0;
	if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		pos = e.pageY;
	}
	else if (e.clientX || e.clientY) 	{
		pos = e.clientY + scrollY();
	}
	return pos;
}

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}
//************ Fin funciones compatibilidad **************

//IE background flicker hack
try {
  document.execCommand("BackgroundImageCache", false, true);
} catch(err) {};