//得到一个随机颜色数值
function getRanColor() {
var str = Math.ceil(Math.random() * 16777215).toString(16);
while (str.length < 6) {
str = '0' + str;
}
return str;
}
function getRanColor() {
var str = Math.ceil(Math.random() * 16777215).toString(16);
while (str.length < 6) {
str = '0' + str;
}
return str;
}