window属性：onblur
onblur属性
该onblur属性表示该blur事件的对象的事件处理程序。它能够在Element，Document和Window中使用。
onblur属性语法
element.onblur = function;- function是用户定义的函数的名称，不带()后缀或任何参数或匿名函数声明，如下所示：
element.onblur = function（）{console.log（“onblur event detected！”）; };
onblur属性示例
<html>
<head>
<title>onblur event example</title>
<script type="text/javascript">
var elem = null;
function initElement()
{
elem = document.getElementById("foo");
// NOTE: doEvent(); or doEvent(param); will NOT work here.
// Must be a reference to a function name, not a function call.
elem.onblur = doEvent;
};
function doEvent()
{
elem.value = 'Bye-Bye';
console.log("onblur Event detected!")
}
</script>
<style type="text/css">
<!--
#foo {
border: solid blue 2px;
}
-->
</style>
</head>
<body onload="initElement();">
<form>
<input type="text" id="foo" value="Hello!" />
</form>
<p>Click on the above element to give it focus, then click outside the
element.<br /> Reload the page from the NavBar.</p>
</body>
</html>