// JavaScript Document
<!-- Start external javascript file contents - save as "search.js" --> 


// Retrieved from: http://www.htmlcodetutorial.com/forms/index_famsupp_157.html   
function SubmitOnEnter(myfield, e)   
{    
    var keycode;   
    if (window.event)   
        keycode = window.event.keyCode;   
    else if (e)   
        keycode = e.which;   
    else
        return true;

    if (keycode == 13 && myfield.value != "")
    {
        SearchSite();   
        return false;   
    }
    else if (keycode == 13 && myfield.value == "")
    {
        return false;   
    }
     else
        return true;
}

//Left Trim
function ltrim(s) {
    return s.replace(/^\s*/, "");
}

function SearchSite(value) {

    var searchBox = ltrim(document.getElementById("q").value)

    if (searchBox != "") {
        document.location.href='http://www.elkontrol.com/Search_results.aspx?cx=004405453803723876604:4dgz3jba3ii&cof=FORID%3A10&ie=UTF-8&q=' + document.getElementById('q').value + '&sa=Search';   
        return true;
    }
    else
        document.getElementById("q").focus();
    return false;
}

<!-- End javascript -->