private static void removeButton(WebDriver driver) {
		((JavascriptExecutor)driver).executeScript(
				"var inputs = document.getElementsByTagName('input');" +
				"for(var i=inputs.length-1; i>=0; i--) {" +
				"  if(inputs[i].type=='button' && inputs[i].value=='') {" +
				"    inputs[i].parentNode.removeChild(inputs[i]);" +
				"  }" +
				"}");
	}