本文实例为大家分享了4种js计算系统当前日期是星期几的方法，供大家参考，具体内容如下
方法一：
// 计算系统当前是星期几var str = "今天是星期" + "日一二三四五六".charat(new date().getday());
方法二：
var a = new array("日", "一", "二", "三", "四", "五", "六");var week = new date().getday();var str = "今天是星期"+ a[week];alert(str);方法三：
var str = "今天是星期";var week = new date().getday();switch (week) { case 0 : str1 += "日"; break; case 1 : str1 += "一"; break; case 2 : str1 += "二"; break; case 3 : str1 += "三"; break; case 4 : str1 += "四"; break; case 5 : str1 += "五"; break; case 6 : str1 += "六"; break;}alert(str);方法四：
var str = "";var week = new date().getday();if (week == 0) { str = "今天是星期日";} else if (week == 1) { str = "今天是星期一";} else if (week == 2) { str = "今天是星期二";} else if (week == 3) { str = "今天是星期三";} else if (week == 4) { str = "今天是星期四";} else if (week == 5) { str = "今天是星期五";} else if (week == 6) { str = "今天是星期六";}alert(str);以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。