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function imageTest(url) {
    var imageTarget = $('#urlImageTester');
    imageTarget.prop('src', url);
    var props = ['naturalHeight', 'fileCreatedDate'];
    var tests = [];
    var answer;
    for (i in props) {
        tests.push(imageTarget.prop(props[i]));
    }
    if ($.browser.msie) {
        (tests[1] == 'undefined') ? answer = false : answer = true;
    } else {
        (tests[0] == 0) ? answer = false : answer = true;
    }
    return answer;
}

// create an image and hide it with css, the id used here us urlImageTester
// the function uses jquery to check if your using IE or another browser and proforms tests dependant on the browser.
// the function returns false if the url passed to it, is  broken or invalid