jquery - Zoom in zoom out on touch devices -


i try zoom in zoom out on touch devices (like phone, tablets...)

function resizeimg(img) {    var resize = 150;     var origh = 61;      var origw = 250;     var mousex = event.x;    var mousey = event.y;    var newh = origh * (resize / 100);    var neww = origw * (resize / 100);      // set new width , height    img.style.height = newh;    img.style.width = neww;      var c = img.parentnode;      // work out new center    c.scrollleft = (mousex * (resize / 100)) - (neww / 2) / 2;    c.scrolltop = (mousey * (resize / 100)) - (newh / 2) / 2;  }
<div id="container">   <img alt="click zoom" onclick="resizeimg(this)"       src="http://www.logiticks.com/wp-content/themes/logiticksv4-theme/images/2015/12/datatable.jpg"/>  </div>

firstly, i'm sorry limited knowledge problem. how can zoom in/zoom out img when run app on touch devices? mean, how can pinch gestures zooom in/out still in div tag (not zoom in/out page/browser)? :d

someone have experienced zooming, please give me idea this? thankful ^^

addition: resizeimg function. still doesn't work on touch devices , reaaly hard use :(


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