将字符串中由空格隔开的每个单词首字母大写

　　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);