本例主要是通过用onClick捕获用户在按钮上的单击事件，然后调用location对象的href方法或window对象的open方法来打开链接。另外一个技巧是通过提交表单来实现链接功能，按钮必须是type=submit类型的按钮，表单的action值就是链接目标，target值就是链接打开的目标方式。-In this case mainly onClick capture users on the button click event, and then call the location object the href method or window object' s open method to open the link. Another technique is to submit the form to the link function, the button type = submit type button form action value is the link target, target value is the link to open the target.