var today = new Date(); var xq = today.getDay(); var Now = today.getHours(); if (xq >= 1 && xq <= 6) { document.write("今天上课" + "<br>") } ; if (xq === 0) { document.write("今天放假") } else { if (Now >= 9 && Now < 12) { document.write("现在是上课时间") } ; if (Now >= 12 && Now < 14) { document.write("现在是下课时间") } ; if (Now >= 14 && Now < 18) { document.write("现在是上课时间") } ; if (Now < 9 ) { document.write("现在还没到上课时间") } ; if (Now >= 18) { document.write("现在是放学时间") } }