title: how to find the x and y coordinates of the image points in javascript
body: <p>Im using google charts for my application, due to some issues in IE8 im using <strong>google image line charts</strong> in my jsp for IE8, but i need tooltip for every points marked in my charts. For that i've <em>trying to find the coordinates of the points marked</em>, but i dont have any idea to find the cordinates in line charts. Please help me to find the coordinates to get the <strong>tooltip in my image charts</strong>. Here is my generated image chart</p>
  
  <p><img src="https://i.stack.imgur.com/N8r4N.png" alt="enter image description here"></p>