function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

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

}

function flash_banner(nombreswf,ancho,alto) {
  document.write('<object type="application/x-shockwave-flash" data="img/banners/'+ nombreswf +'" width="'+ancho+'" height="'+alto+'"><param name="movie" value="img/banners/'+ nombreswf +'" /><param name="bgcolor" value="#fff" /><param name="menu" value="false" /><param name="wmode" value="opaque" /></object>');
}