window.onload = function() {
	var left = document.getElementById('left');
	var right = document.getElementById('right');
	if(left.style.width != 'auto' && left.clientHeight < right.clientHeight)
		left.style.height = right.clientHeight-20+'px';
};
function abre(janela,larg,alt){
	window.open(janela, '_blank', 'top='+ parseInt((screen.availHeight/2) - (alt/2))+', left='+ parseInt((screen.availWidth/2) - (larg/2)) +', width='+larg+',height='+alt+',toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no');
}