title: How to bring a feature marker to the front in openlayers?
body: <p>I drew several featrues(OpenLayers.Feature.Vector) on the layer,rendering as follows:</p>
  
  <p><img src="https://i.stack.imgur.com/RECY4.png" alt="enter image description here"></p>
  
  <p>The question is how to bring the feature marker "H" to the front when it is clicked.</p>
  
  <p>I used 'drawFeature()' method to redraw it ,but it remained the way it was.</p>
  
  <p>Does anyone know why? Thanks a lot!</p>