setInterval(function(){
    dt = new Date();
    var y = dt.getFullYear();
    var mt = dt.getMonth()+1;
    var day = dt.getDate();
    var h = dt.getHours();
    var m = dt.getMinutes();
    var s = dt.getSeconds();
	
    // document.getElementById('showTime').innerHTML = y+'年'+mt+'月'+day+'日'+h+'时'+m+'分'+s+'秒';
	document.getElementById('showTime').innerHTML =y+'-'+padding1(mt,2)+'-'+padding1(day,2)+' '+padding1(h,2)+':'+padding1(m,2)+':'+padding1(s,2)+'';
	
	function padding1(num, length) {
	    for(var len = (num + "").length; len < length; len = num.length) {
	        num = "0" + num;
	    }
	    return num;
	}
},1000)