Cannot return from outside a function or method.
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今天在做一个删除功能，当点击删除按钮时，想要给用户一个提示，所以在jsp页面中就想通过 onclick="return confirm('确定要删除吗？')” 来实现，但是confirm（）方法提示：Cannot return from outside a function or method。解决这个问题的方法很简单，总结一下有两种：
方法一
window --》preferences --> myeclipse --> validation -->javascript validator for Js files 把Build复选框的选项去掉就好了。
方法二
在当前项目右击，找到myeclipse -->Exclude Form Validation单击，可以看到出现了“√”，这时就不报错了。
方法三
去掉return关键字。
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