将字符串中由空格隔开的每个单词首字母大写

字符串中，每个单词由空格隔开，空格的个数不限

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"

words[i] = words[i].charAt(0).toUpperCase() + words[i].slice(1);