js求星期几

var weekArray = new Array("周日", "周一", "周二", "周三", "周四", "周五", "周六");

 

function genDateLi(dateArr) {
		var data = [];
		for (var i=0; i<dateArr.length; i++) {
			var date = dateArr[i];
			var arys1 = date.split('-');     //日期为输入日期，格式为 2013-3-10
			var ssdate = new Date(arys1[0], parseInt(arys1[1]-1), arys1[2]);   
			var weekIndex = ssdate.getDay();  //就是你要的周几
			
			data.push('<li class="d_sli" dateStr=' + date + '>');
			data.push('<a href="javascript:;">');
			data.push('<p class="rq">' + date.substring(5)+ '</p><p class="xq">' + weekArray[weekIndex] + '</p>');
			data.push('</a>');
			data.push('<i class="d_sli_xz"></i>');
			data.push('</li>');
		}
		return data.join('');
	}