inject text into website 27s textbox

1//HTML Textbox w/Getting Javascript Input:
2<script>
3  function getTextBox(){
4    var k = document.getElemntById('myTextBox').value
5    alert(k)
6  }
7</script>
8<input type="text" id="myTextBox">
9<button onclick="getTextBox()">Get Text Input</button>

1 $('.lazy').lazy({
2                scrollDirection: 'vertical',
3                effect: 'fadeIn',
4                visibleOnly: true,
5                effectTime: 1000,
6                threshold: 0,
7                successLoader: function (element, respond) {
8                    respond(true);
9                }
10            });