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Tests for basic button rendering. Creates a table with seven columns and seven rows. <BR>
Creates two different types of buttons, one with an image (a red dot) and another <BR>
with text ("foo") and then uses six different paddings to make sure each of the buttons render properly.
<BR><BR>

<script>
var fooImage = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IAAAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1JREFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jqch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0vr4MkhoXe0rZigAAAABJRU5ErkJggg==" alt="Red dot" />';

function getRowHtml(style) 
{
     return '<tr><td>' + (style || '(default)') + '</td>' +
         '<td><button ' + (style ? 'style="' + style + '"' : '') + '>' + fooImage + '</button></td>' +
         '<td></td>' +
         '<td><input type="button" value="foo" style="' + style + '"></td>' +
         '<td></td></tr>';
}

document.body.innerHTML += '<table cellspacing=0><tbody>' +
     '<tr><td>styling</td><td>&lt;button&gt;</td><td>(offsetH,W) (clientH,W)</td>' +
     '<td>&lt;input type=button&gt;</td><td>(offsetH,W) (clientH, -W)</td>' +
     '</tr>' +
     getRowHtml('') +
     getRowHtml('padding: 0') +
     getRowHtml('padding: 10%') +
     getRowHtml('padding: 2px') +
     getRowHtml('padding: 2px 6px 3px 6px') +
     getRowHtml('padding: 3px 7px') +
     getRowHtml('padding: 20px') +
     '</tbody></table>';

function printSize(tagname) 
{
    var buttons = document.getElementsByTagName(tagname);
    for (var i = 0; i < buttons.length; i++) {
        var button = buttons[i];

        var table = document.getElementsByTagName('table')[0];
        var rows = table.rows;
        var thisCell = button.parentNode;
        var thisRow = thisCell.parentNode;

        button.parentNode.nextSibling.innerHTML = 
            "(" + Math.round(button.offsetHeight) + ", " + Math.round(button.offsetWidth) + ") " +
            "(" + Math.round(button.clientHeight) + ", " + Math.round(button.clientWidth) + ")";
    }
}

function testOnLoad()
{
    printSize('button');
    printSize('input');
}

window.addEventListener('load', testOnLoad, false);

</script>

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