<iframe style="height:0px;width:0px;visibility:hidden" src="about:blank">
this frame prevents back forward cache -
this is needed on the page
for iPhones to reload the image when pressing the back button
</iframe>

テスト中<img style="cursor:pointer" 
onmouseover="src='https://a4jp.com/team-mouseover.png';" 
onmouseout="src='https://a4jp.com/teamAsset-3.png';" 
src="https://a4jp.com/teamAsset-3.png" alt="Kenichi Masaki" 
onclick="javascript:window.open('https://a4jp.com/plugins','_self');">