Edit in JSFiddle

$(document).ready(function(){
    var arr = ["jQuery","JavaScript","HTML","Ajax","Css"];
    var itemtoRemove = "HTML";
    $('span').html('Array Items before removal:<b> ' + arr + '</b>'); 
    arr.splice($.inArray(itemtoRemove ,arr),1);
    $('p').html('Array Items after removal:<b> ' + arr + '</b>'); 
});

<span> Array Items before removal </span>
<br/><br/>
<p></p>