$(document).ready(function(){
  columnas();
  $("a[@rel^='external']").attr('target','_blank');
  $("a[@rel^='external']").attr('style','cursor:alias');
  $('#promocion').cycle({
    fx: 'fade',
    speed: 'slow',
    timeout: 5000
  });
});


function columnas() {
  var cab = 100, esc = 200, pie = 26;
  if (document.body.offsetHeight) var alt = document.body.offsetHeight, fil = 30; //Internet Explorer
  if (window.innerHeight) var alt = window.innerHeight, fil = 26; //Mozilla
  var c = alt-(cab+esc+fil+pie);
  if (document.body.offsetHeight) {
    document.getElementById('izquierda').style.height = c;
    document.getElementById('derecha').style.height = c;
  }
  document.getElementById('centro').style.height = c;
}


function correctPNG() { var arVersion = navigator.appVersion.split("MSIE"); var version = parseFloat(arVersion[1]); if ((version < 7) && (document.body.filters)) { for(var i=0; i<document.images.length; i++) { var img = document.images[i]; var imgName = img.src.toUpperCase(); if (imgName.substring(imgName.length-3, imgName.length) == "PNG") { var imgID = (img.id) ? "id='" + img.id + "' " : ""; var imgClass = (img.className) ? "class='" + img.className + "' " : ""; var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "; var imgStyle = "display:inline-block;" + img.style.cssText; if (img.align == "left") imgStyle = "float:left;" + imgStyle; if (img.align == "right") imgStyle = "float:right;" + imgStyle; if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle; var strNewHTML = "<span " + imgID + imgClass + imgTitle + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"; img.outerHTML = strNewHTML; i = i-1; } } } } 
if (navigator.appName == 'Microsoft Internet Explorer') {  window.attachEvent("onload", correctPNG); }