title: Preloading css before html
body: <p>I am applying css stylesheet to some wiki pages in SharePoint. 
  My problem is that sometimes, the content of the page is shown without any format and about after one second, the css is downloaded and applied. </p>
  
  <p>I would like to avoid this problem by pre-loading the css, before rendering the HTML content. A temporary "Loading content..." image would do it as well. Is there any way to do it? </p>
  
  <p>I am using a content editor linking the txt file with the css code for this purpose (I cannot add the code in all pages in order to be easier to maintain either). </p>
  
  <p>Thanks in advance. </p>