convert base64 to image in javascript jquery

Question

I have written some code for image capturing using javascript/jquery Below is the code:

function capture_image(){ 
    alert("capture_image");
    var p = webcam.capture();
    webcam.save();           
    alert("capture complete "+p); //getting true here


     var img = canvas.toDataURL("image");
    var item_image = img.replace(/^data:image\/(png|jpg);base64,/, "") ; 
    alert("item_image"+item_image);
}

The item_image print the base64 format, How to convert that base64 to image and how to use that path in javascript clientside.

Am searching google so many websites but its not working and that code is not suitable for my requirement.