js generate random color
function get_random_color()
{
var color = "";
for(var i = 0; i < 3; i++) {
var sub = Math.floor(Math.random() * 256).toString(16);
color += (sub.length == 1 ? "0" + sub : sub);
}
return "#" + color;
}
function get_rand_color()
{
var color = Math.floor(Math.random() * Math.pow(256, 3)).toString(16);
while(color.length < 6) {
color = "0" + color;
}
return "#" + color;
}