function swapElement(number, elements) {
  for(var i = 0; i < elements.length; ++i) {
    if(number != i)
      document.getElementById(elements[i]).style.display = 'none';
    else
      document.getElementById(elements[i]).style.display = 'block';
  }
}

function changeProductAddURL (baseURL, category, pid) {
	var anchor = document.getElementById("addlink_"+pid);
	var version_name = document.getElementById("product_version_dropdown_"+pid).value;
	var href = anchor.getAttribute("href");
	if (version_name == 'NA') {
		anchor.removeAttribute('href');
		anchor.style.textDecoration="none";
	} else {
		if (anchor) anchor.setAttribute('href',baseURL+"?add="+category+"/"+pid+"&size="+version_name);
		anchor.style.textDecoration="underline";
	}
}