<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>让IE低版本浏览器也支持placeholder属性</title>
<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery/jquery-1.11.1.min.js"></script>
<script type="text/javascript">
$(function () {
if (/MSIEs(d+)/.test(navigator.userAgent) && navigator.userAgent.match(/MSIEs(d+)/)[1] < 10) {
$('[placeholder]').each(function () {
var pla = $(this).attr('placeholder');
$(this).focus(function () {
if ($(this).val() == pla) {
$(this).val('');
}
}).blur(function () {
if ($(this).val() == '') {
$(this).val(pla);
}
});
$(this).trigger('blur');
});
}
});
</script>
</head>
<body>
<input type="text" placeholder="请输入关键字" />
</body>
</html>