Use for adding link from offer to all post images

gistfile1.txt

<script>
jQuery(document).ready(function($) {
if ($('.single-post .btn_offer_block').length > 0) {
   var linkoffer = $('.single-post .btn_offer_block').first().attr('href'); 
   $('img[class*="wp-image-"]').each(function(){
      if($(this).parents('a').length == 1){
         return;
      }
      else{
         $(this).wrap('<a href="' + linkoffer + '" target="_blank" rel="nofollow"></a>');               
      }      
   }) 
}        
})
</script>