处理新窗口 类似于新增(新增窗口没在frame中)、注册、等等
String parent = driver.getWindowHandle();
driver.findElement(By.id("老式窗口的id名字").click();
Set<String> all = driver.getWindowHandles();
Iterator<String> iter = all.iterator();
String temp;
while(iter.hasNext()){
temp = iter.next();
if(!temp.equals(parent)){
driver.switchTo().window(temp)
}
}