#test_tool {text-align: center; position: absolute; width: 150px; left: 0;}

#test_tool a {color: #000; background: #fff; text-decoration: underline; display: block; text-align: left; padding: 2px; border: 1px solid #ccc; margin-bottom: 2px; }
#test_tool a:hover {text-decoration: none;}