标签:
$(
function
(){
if
(!placeholderSupport()){
// 判断浏览器是否支持 placeholder
$(
‘[placeholder]‘
).focus(
function
() {
var
input = $(
this
);
if
(input.val() == input.attr(
‘placeholder‘
)) {
input.val(
‘‘
);
input.removeClass(
‘placeholder‘
);
}
}).blur(
function
() {
var
input = $(
this
);
if
(input.val() ==
‘‘
|| input.val() == input.attr(
‘placeholder‘
)) {
input.addClass(
‘placeholder‘
);
input.val(input.attr(
‘placeholder‘
));
}
}).blur();
};
})
function
placeholderSupport() {
return
‘placeholder‘
in
document.createElement(
‘input‘
);
}
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原文地址:http://www.cnblogs.com/frxing/p/5070550.html