$.fn.equalHeights = function(px) {
  $(this).each(function(){
    var currentTallest = 0;
    $(this).children().each(function(i){
      if ($(this).height() > currentTallest) { currentTallest = $(this).height(); }
    });
    if (!px || !Number.prototype.pxToEm) currentTallest = currentTallest.pxToEm(); //use ems unless px is specified
    // for ie6, set height since min-height isn't supported
    if ($.browser.msie && $.browser.version == 6.0) { $(this).children().css({'height': currentTallest}); }
    $(this).find('.chamada_noticia').css({'height': currentTallest}); 
  });
  return this;
};

// just in case you need it...
$.fn.equalWidths = function(px) {
  $(this).each(function(){
    var currentWidest = 0;
    $(this).children().each(function(i){
        if($(this).width() > currentWidest) { currentWidest = $(this).width(); }
    });
    if(!px || !Number.prototype.pxToEm) currentWidest = currentWidest.pxToEm(); //use ems unless px is specified
    // for ie6, set width since min-width isn't supported
    if ($.browser.msie && $.browser.version == 6.0) { $(this).children().css({'width': currentWidest}); }
    $(this).children().css({'min-width': currentWidest}); 
  });
  return this;
};


Number.prototype.pxToEm = String.prototype.pxToEm = function(settings){
  //set defaults
  settings = jQuery.extend({
    scope: 'body',
    reverse: false
  }, settings);
  
  var pxVal = (this == '') ? 0 : parseFloat(this);
  var scopeVal;
  var getWindowWidth = function(){
    var de = document.documentElement;
    return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
  };  
  
  /* When a percentage-based font-size is set on the body, IE returns that percent of the window width as the font-size. 
    For example, if the body font-size is 62.5% and the window width is 1000px, IE will return 625px as the font-size.  
    When this happens, we calculate the correct body font-size (%) and multiply it by 16 (the standard browser font size) 
    to get an accurate em value. */
        
  if (settings.scope == 'body' && $.browser.msie && (parseFloat($('body').css('font-size')) / getWindowWidth()).toFixed(1) > 0.0) {
    var calcFontSize = function(){    
      return (parseFloat($('body').css('font-size'))/getWindowWidth()).toFixed(3) * 16;
    };
    scopeVal = calcFontSize();
  }
  else { scopeVal = parseFloat(jQuery(settings.scope).css("font-size")); };
      
  var result = (settings.reverse == true) ? (pxVal * scopeVal).toFixed(2) + 'px' : (pxVal / scopeVal).toFixed(2) + 'em';
  return result;
};