function pop_up_scroll(href, titulo,  w,h, left, top ){
	window.open(href, titulo, "menubar=0,toolbar=0,scrollbars=1,directories=0,resize=0,width="+w+",height="+h+",left="+left+", top="+top);
}

function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}

function keepMeAlive(imgName) {
    myImg = document.getElementById(imgName);
    if (myImg) myImg.src = myImg.src.replace(/\?.*$/, '?' + Math.random());
}