IE8,IE9 placeholder対応

//IE8,IE9 placeholder対応
$(function () {
var supportsInputAttribute = function (attr) {
var input = document.createElement('input');
return attr in input;
};
if (!supportsInputAttribute('placeholder')) {
$('[placeholder]').each(function () {
var
input = $(this),
placeholderText = input.attr('placeholder'),
placeholderColor = 'GrayText',
defaultColor = input.css('color');
input.
focus(function () {
if (input.val() === placeholderText) {
input.val('').css('color', defaultColor);
}
}).
blur(function () {
if (input.val() === '') {
input.val(placeholderText).css('color', placeholderColor);
} else if (input.val() === placeholderText) {
input.css('color', placeholderColor);
}
}).
blur().
parents('form').
submit(function () {
if (input.val() === placeholderText) {
input.val('');
}
});
});
}
});