function titleCase(str) {
var aa = str.toLowerCase();
var arr = aa.split(" ");
var array = [];
for (var i in arr) {
cc = arr[i].replace(/^\S/, arr[i][0].toUpperCase());
array.push(cc);
}
return array.join(" ");
}
titleCase("I‘m a little tea pot");
titleCase("I‘m a little tea pot") 应该返回一个字符串titleCase("I‘m a little tea pot") 应该返回 "I‘m A Little Tea Pot".titleCase("sHoRt AnD sToUt") 应该返回 "Short And Stout".titleCase("HERE IS MY HANDLE HERE IS MY SPOUT") 应该返回 "Here Is My Handle Here Is My Spout".原文：http://www.cnblogs.com/spectrelb/p/7527324.html