select标签模拟/美化方法采用JS外挂式插件_jquery

$.fn.extend({
locate: function (x, y) {
if (this.css("position") == "fixed") {
y -= $(document).scrollTop();
}
return this.css({ left: x, top: y });
},
locateBeside: function (el, adjustX) {
var p = $(el).offset(),
w1 = $(el).outerWidth(),
w2 = this.outerWidth(),
h2 = this.outerHeight(),
x = p.left + w1 + 5 + (adjustX || 0),
y = p.top;
if ($(document).width() < x + w2) {
x = p.left - w2 - 5 - (adjustX || 0);
}
if ($(document).height() < y + h2) {
y = p.top - (y + h2 + 15 - $(document).height());
}
return this.locate(x, y);
},
locateBelow: function (el, adjustY) {
var p = $(el).offset();
return this.locate(p.left, p.top + $(el).outerHeight() + 3 + (adjustY || 0));
},
locateCenter: function () {
return this.locate(
($(window).width() - this.width()) / 2,
($(window).height() - this.height()) / 2 + $(document).scrollTop()
);
}
});

input.dummy { background-image: url(/static/images/combo.gif); background-position: right 12px; background-repeat: no-repeat; cursor: pointer !important; }
input.dummy:hover, input.dummy:focus { background-image: url(/static/images/combo_hover.gif); }
#dummydata { position: absolute; z-index: 20; border: 1px solid #a4601e; background-color: #393939; max-height: 200px; overflow: auto; }
#dummydata a { display: block; color: #ddd; line-height: 25px; text-indent: 3px; text-overflow: ellipsis; }
#dummydata a:hover { color: #198cef; text-decoration: none; }
#dummydata.matrix { width: 208px; padding: 5px; } /* matrix 效果 */
#dummydata.matrix a { float: left; width: 33%; }
#dummydata.matrix-large { width: 640px; padding: 5px; } /* matrix-large 效果 */
#dummydata.matrix-large a { float: left; width: 25%; }
#dummydata a.fullwidth { float: none; }
#dummydata a.delimiter { float: none; width: 100%; height: 10px; visibility: hidden; }
#dummydata a.selected { color: yellow; }