RGB color value to HTML 16 (HEX) Code JS function _javascript Skills

Copy Code code as follows:

Go to a fixed-length hexadecimal string, not enough to fill 0
function Zero_fill_hex (num, digits) {
var s = num.tostring (16);
while (S.length < digits)
s = "0" + s;
return s;
}

Damn it, how did you find out how to use JavaScript to figure out a background color, you have to parse
function Rgb2hex (RGB) {
Nnd, firefox/ie not the same, Fxck
if (Rgb.charat (0) = = ' # ')
return RGB;
var n = number (RGB);
var ds = Rgb.split (/\d+/);
var decimal = number (Ds[1]) * 65536 + number (ds[2)) * 256 + number (ds[3));
Return "#" + Zero_fill_hex (decimal, 6);
}