| <style> | 
 |     img { width: 30px; height: 30px; background-color: red; } | 
 |     .cover { position: absolute; background-color: green; opacity: 0.7; } | 
 | </style> | 
 | <div style="width: 500px; | 
 |     background-color: lightyellow; | 
 |     writing-mode: vertical-rl; | 
 |     font: 40px Ahem; | 
 |     color: red; | 
 |     -webkit-font-smoothing: none; | 
 | "> | 
 |     <br> | 
 |     <br> | 
 |     <img id="t-0"> | 
 |     <ruby id="t-1">1<span id="t-2">2</span><rt id="t-3">3</rt></ruby> | 
 |     <span> | 
 |         <div id="t-4" style="display: inline-block">4<div id="t-5">5</div></div> | 
 |     </span> | 
 |     <span id="t-5"> | 
 |         <img id="t-6"> | 
 |     </span> | 
 |     <span id="t-7"> | 
 |         7 <span id="t-8">8</span> | 
 |     </span> | 
 | </div> | 
 | <script> | 
 |     for (var i = 0; i < 9; ++i) { | 
 |         var element = document.getElementById("t-" + i); | 
 |         var clientRect = element.getClientRects()[0]; | 
 |         var cover = document.createElement("div"); | 
 |         cover.className = "cover"; | 
 |         cover.style.width = clientRect.width + "px"; | 
 |         cover.style.height = clientRect.height + "px"; | 
 |         cover.style.top = clientRect.top + "px"; | 
 |         cover.style.left = clientRect.left + "px"; | 
 |         document.body.appendChild(cover); | 
 |     } | 
 | </script> |