{
    "src": "../_shared/img/img1.jpg",
    "title": "Image 1",
    "onclick": "get_src()"
}

<img onclick="test()" src="../_shared/img/img1.jpg" alt="Image 1">

function test() {
    alert( $(this).attr('src') );
}

<img onclick="test(this)" src="../_shared/img/img1.jpg" alt="Image 1">

function test(ele) {
    alert( $(ele).attr('src') );
}