javascript 定制选择器

// custom selector `:findday` used to match on specified day in ms.
//
// The selector is passed a date in ms and elements are added to the
// selection filter if the element date matches, as determined by the
// id attribute containing a parsable date in ms.
$.extend($.expr[":"], {
findday: function (a, i, m) {
var cd = new Date(parseInt(m[3], 10));
var id = $(a).attr("id");
id = id ? id : "";
var si = id.indexOf("-") + 1;
var ed = new Date(parseInt(id.substring(si, id.length), 10));
cd = new Date(cd.getFullYear(), cd.getMonth(), cd.getDate());
ed = new Date(ed.getFullYear(), ed.getMonth(), ed.getDate());
return cd.getTime() === ed.getTime();
}
});
// custom selector `:findweek` used to match on specified week in ms.
$.extend($.expr[":"], {
findweek: function (a, i, m) {
var cd = new Date(parseInt(m[3], 10));
var id = $(a).attr("id");
id = id ? id : "";
var si = id.indexOf("-") + 1;
cd = cd.getFullYear() + "-" + cd.getDayForWeek().getWeekOfYear();
var ed = id.substring(si, id.length);
return cd === ed;
}
});
// custom selector `:findmonth` used to match on specified month in ms.
$.extend($.expr[":"], {
findmonth: function (a, i, m) {
var cd = new Date(parseInt(m[3], 10));
cd = cd.getFullYear() + "-" + cd.getMonth();
var id = $(a).attr("id");
id = id ? id : "";
var si = id.indexOf("-") + 1;
var ed = id.substring(si, id.length);
return cd === ed;
}
});