document.write(' 解析：
字符串中，每个单词由空格隔开，空格的个数不限。
代码如下：
function capitalize(sting) {
var words = string.split(" ");
for(var i = 0; i < words.length; i++) {
words[i] = words[i].charAt(0).toUpperCase() +
words[i].slice(1);
}
return words.join(" ");
}
var string = "Ajax Cookie Event object";
capitalize(string); // "Ajax Cookie Event Object"
');