div{

background-color: red;
-webkit-filter:brightness(1);//兼容不同瀏覽器
-o-filter:brightness(1);
-moz-filter:brightness(1);
filter:brightness(1);//設置亮度值，范圍：0-1

}

動態設置亮度值

　　var tem = 0.5; 

$(".div").css('filter','brightness('+temp+')');