function over(imagen){ document.images[imagen].src = String("imgs/o.gif"); }
	
function out(imagen){ document.images[imagen].src = String("imgs/d.gif"); }

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}

function doCronos(orden, ancho, alto) {
	destino = 'cronos' + orden + '.html';
	ventana = window.open(destino, '', 'status = 1, height = ' + alto + ', width = ' + ancho + ', resizable = 1' );
	ventana.focus();
}

function doComo(orden, ancho, alto) {
	destino = 'como' + orden + '.html';
	ventana = window.open(destino, '', 'status = 1, height = ' + alto + ', width = ' + ancho + ', resizable = 1' );
	ventana.focus();
}


function nuImg(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = 'imgs/b_' + arg;
		return rslt;
	}
}

function chgBtn() {
	if (document.images && (preloadFlag == true)) {
		document[chgBtn.arguments[0]].src = 'imgs/b_' + chgBtn.arguments[0] + chgBtn.arguments[1] + '.png';
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		logistica_ov = nuImg("logi2");
		fbuil_ov = nuImg("fbuil2");
		larf_ov = nuImg("larf2");
		tramsa_ov = nuImg("tram2");
		natura_ov = nuImg("natu2");
		salitral_ov = nuImg("sali2");
		tammotor_ov = nuImg("tam2");
		automocion_ov = nuImg("auto2");
		indotam_ov = nuImg("indo2");
		laregional_ov = nuImg("lareg2");
		transportes_ov = nuImg("tran2");
		logistica_on = nuImg("logi3");
		fbuil_on = nuImg("fbuil3");
		larf_on = nuImg("larf3");
		tramsa_on = nuImg("tram3");
		natura_on = nuImg("natu3");
		salitral_on = nuImg("sali3");
		tammotor_on = nuImg("tam3");
		automocion_on = nuImg("auto3");
		indotam_on = nuImg("indo3");
		laregional_on = nuImg("lareg3");
		transportes_on = nuImg("tran3");
		preloadFlag = true;
	}
}