直接看代码，心里想想输出结果：
document.write("<br>new Date() > new Date() := " + (new Date() > new Date()));
document.write("<br>new Date() < new Date() := " + (new Date() < new Date()));
document.write("<br>new Date() >= new Date() := " + (new Date() >= new Date()));
document.write("<br>new Date() <= new Date() := " + (new Date() <= new Date()));
document.write("<br>new Date() == new Date() := " + (new Date() == new Date()));
document.write("<br>new Date() === new Date() := " + (new Date() === new Date()));结果来了：
new Date() > new Date() := false
new Date() < new Date() := false
new Date() >= new Date() := true
new Date() <= new Date() := true
new Date() == new Date() := false
new Date() === new Date() := false