Disable zoom in and Out in browse

disable zoom in browser by Ctrl+ or Ctrl- or Using Ctrl Key + Mouse wheel Up or down by this code.

HTML

<h2>Zoom in or out Browser window by Ctrl+ / Ctrl- Key or by using Mouse Wheel + Ctrl Key    </h2>

JavaScript

$(document).ready(function(){
	$(document).keydown(function(event) {
	    	    if (event.ctrlKey==true && (event.which == '61' || event.which == '107' || event.which == '173' || event.which == '109'  || event.which == '187'  || event.which == '189'  ) ) {
         alert('disabling zooming'); 
		event.preventDefault();
		// 107 Num Key  +
		//109 Num Key  -
		//173 Min Key  hyphen/underscor Hey
		// 61 Plus key  +/=
	     }
	});

	$(window).bind('mousewheel DOMMouseScroll', function (event) {
	       if (event.ctrlKey == true) {
           alert('disabling zooming'); 
		   event.preventDefault();
	       }
	});
});


document.addEventListener("gesturestart", function (e) {
	e.preventDefault();
    document.body.style.zoom = 0.99;
});

document.addEventListener("gesturechange", function (e) {
	e.preventDefault();

  document.body.style.zoom = 0.99;
});
document.addEventListener("gestureend", function (e) {
	  e.preventDefault();
    document.body.style.zoom = 1;
});