javascript 生成随机颜色

/**

*

* 生成随机颜色

* @return rand

*/

function randomColor( ) {

 var rand = Math.floor(Math.random( ) * 0xFFFFFF).toString(16);

 if(rand.length == 6){

 return rand;

 }else{

 return randomColor();

 }

}


/**

* 反转颜色

* @return 0xFFFFFF-color

*/

function turnColor(color) {

 var color=(0xFFFFFF-Math.floor("0x"+color)).toString(16);

 var len = 6-color.length;

 for(var i=0; len!=i; i++) {

 color = "0"+color;

 }

 return color;

}


/**

* 倒计时

* @param time Date

* @return *日*时*分*秒

*/

function nowToDate(time){

 var now = new Date();

 if(time>now){

 var tmp = time - now;

 //秒

 tmp = Math.floor(tmp/1000);

 second = tmp%60;

 //分

 tmp = Math.floor(tmp/60);

 minute = tmp%60;

 //时

 tmp = Math.floor(tmp/60);

 hour = tmp%24;

 //天

 date = Math.floor(tmp/24);


 return "距离"+time.toLocaleString()+ "还有"+

 date+"天"+

 hour+"时"+

 minute+"分"+

 second+"秒";

 }else{

 return "你指定的时间已过去";

 }

}