javascript 生成随机颜色

http://hi.baidu.com/lovebwf/blog/item/ddf768168f31894f20a4e942.html

/**
*
* 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";
    }
}