//获取动态时间 var t = null; t = setTimeout(time,1000);// 开始执行 function time() { clearTimeout(t);// 清除定时器 dt = new Date(); var y=dt.getYear()+1900; var mm=dt.getMonth()+1; var d=dt.getDate(); var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]; var day=dt.getDay(); var h=dt.getHours(); var m=dt.getMinutes(); var s=dt.getSeconds(); if(h<10){h="0"+h;} if(m<10){m="0"+m;} if(s<10){s="0"+s;} $("#time").html( y+"年"+mm+"月"+d+"日 "+weekday[day]+" "+h+":"+m+":"+s+""); t = setTimeout(time,1000); // 设定定时器,循环执行 } /** * * @param hex 例如:"#23ff45" * @param opacity 透明度 * @returns {string} */ function hexToRgba(hex, opacity) { return "rgba(" + parseInt("0x" + hex.slice(1, 3)) + "," + parseInt("0x" + hex.slice(3, 5)) + "," + parseInt("0x" + hex.slice(5, 7)) + "," + opacity + ")"; } function test() { var hex1='#2c69a8'; var opt1='0.5'; var result=hexToRgba(hex1,opt1); }