js input的onblur与onchange的区别
onblur：只要input失去焦点就会触发 onblur事件。不管input框里面的值是否改变，都会触发事件。onchange：只有当input框里面的值发生变化才会执行，这里加了值判断 。
请看下面实例：
<code> <meta http-equiv="Content-Type" content="text/html; charset=GB2312"> </code>
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