getAllStyles.js

var styleObject = function() {
  this.classes = null;
 
  var allClasses = document.styleSheets;
 
  for (var i = 0; i < allClasses.length; i++) {
    var cls = allClasses[i];
    if (cls.title === "nvd3") {
      this.classes = cls.rules;
      break;
    }
  };
 
}
 
styleObject.prototype.applyToElements = function(parent) {
  for (var i = 0; i < parent.children.length; i++) {
    var child = parent.children[i];
    this.applyToElements(child);
  };
  this.applyToElement(parent);
}
 
styleObject.prototype.applyToElement = function(element) {
  function dumpComputedStyles(elem) {
    var allStyles = [];
 
    var cs = window.getComputedStyle(elem,null);
    var len = cs.length;
    for (var i=0;i<len;i++) {
   
      var style = cs[i];
      allStyles.push(style+" : "+cs.getPropertyValue(style));
    }

    // Finally, copy the element styles
    if (element.style) {
      allStyles.push(element.style.cssText);
    }
 
    return allStyles;
  }
 
  var allStyles = dumpComputedStyles(element)
  element.setAttribute('style', allStyles.join(';'));
}