//字符倒序
function countNumbers(str) {
var sum = 0;
//字符串去空格
str = str.replace(/\s*/g,"");
// 分割字符串为单字符数组
var arr = str.split("");
// 遍历数组
for(var i in arr) {
sum++;
}
return sum;
}
var stringValue = "Rome was not built in a day";
document.write(countNumbers(stringValue));