<body>
<div id="mainDiv" class="mainDiv">
Kt obrotu:
  <input type="text" id="tfAngle" class="myTextInput" style="width:20px;">
<input type="button" id="btnWykonaj" value="Wykonaj"
       class="myButton" onclick="getImage();">
</div>
<div id="dataDiv" class="dataDiv" style="text-align:center;">
<img src='dane.php' alt='' id="img1">
</div>
</body>