使用javascript 自動random顏色
var newColor = '#'+(0x1000000+(Math.random())*0xffffff).toString(16).substr(1,6);
jQuery(".font-style").animate({color: newColor}, 2000); // animate
var newColor = '#'+(0x1000000+(Math.random())*0xffffff).toString(16).substr(1,6);
jQuery(".font-style").animate({color: newColor}, 2000); // animate