// JavaScript Document
/*Random Background Image-
By Website Abstraction (www.wsabstract.com)
More free JavaScripts here!
*/
var fondo = new Array();


fondo[0] = 'images/backgr1.jpg';
fondo[1] = 'images/backgr2.jpg';
fondo[2] = 'images/backgr3.jpg';
fondo[3] = 'images/backgr4.jpg';


var ele = Math.round(Math.random()*4);

document.write( '<style type="text/css">' );
document.write('body{');
document.write('background-image: url("'+fondo[ele]+'");');
document.write('}');
document.write('</style>');

/*Moviment de capa*/
	var capa = null;
	var _IE_ = navigator.userAgent.indexOf("MSIE") != -1;

	function liberaCapa() {
		capa = null;
	}
	
	function clickCapa(e, obj) {
		capa = obj.parentNode;
		if (_IE_) {
			difX = e.offsetX;
			difY = e.offsetY;
		} else {
			difX = e.layerX;
			difY = e.layerY;
		}
	}
	
	function mueveCapa(e) {
		if (capa != null) {
			capa.style.top = (e.clientY-difY)+"px";
			capa.style.left = (e.clientX-difX)+"px";
		}
	}

/*Menus i continguts*/

function init(){
	for(var i=2; i<=5; i++){
		document.getElementById('contenido'+i).style.display = 'none';
	}
}

function viewSection(id,total){
	for (var i=1; i<=5; i++){
		if(i!=id){
			document.getElementById('contenido'+i).style.display = 'none';
		}else{
			document.getElementById('contenido'+i).style.display = 'block';
		}
	}
}