js 生成随机颜色样式，并赋值给表单元素

function setColor() {
 $("span.cm-variable").each(function() {
  $(this).css("color", generateColor());
 });
}

function generateColor() {
var cNumR = Math.random()*255;
var cNumG = Math.random()*255;
var cNumB = Math.random()*255;
var color = "rgb("+cNumR+","+cNumG+","+cNumB+")";
return color;
}