$(document).ready(function () {
if ($.
browser.msie)
$("input:text,input:password").
each(function () {
VAR $placeholder = $(this).attr("placeholder");
var $width = $(this).css("width");
var $id = $(this).attr("id");
var $h
eight = parseInt($(this).css("height")) + 6 + "px";
var $fontSize = $(this).css("font
-size");
var $fontWeight = $(this).css("
font-weight");
var $lineHeight = $height;
if ($(this).css("line-height") != "normal") {
$lineHeight = parseInt($(this).css("line-height")) + 6 + "px";
}
if ($placeholder != un
defined) {
$(this).after("<span class=\"placeholder ph_" + $id + "\" style=\"width:" + $width + ";line-height:" + $lineHeight + ";height:" + $height + ";font-weight:" + $fontWeight + "
;margin-left:-" + $width + ";font-
Size:" + $fontSize + "\">" + $placeholder + "</span>");
}
$(this).bind("keyup", function () {
if ($(this).val()
== "") {
$(this).parent().find(".ph_" + $id).css("dis
play", "inline-block");
}
else {
$(this).parent().find(".ph_" + $id).css("display", "none");
}
});
});
$(".placeholder").live("click", function () {
$(this).p
rev().focus();
});
});
<input id="
n1" ty
PE="text" placeholder="我是提示内容
正常" />
<input id="n2" type="text" placeholder="我是提示内容
宽高" style="width:100px;height:100px;" />
<input id="n3" type="text" placeholder="我是提示内容我有其他样式" / style="width:300px;height:40px;font-weight:bold;">
<input id="n4" type="text" placeholder="还可以尝试下其他的" />