Javascript 表单序列化的实例学习

//Javascript 表单序列化
function serializeForm(whichForm) 
{ 
    var parts = new Array(); 
    var field = null; 
    for (var i = 0, len = whichForm.elements.length; i < len; i++) 
    { 
        field = whichForm.elements[i]; 
        switch (field.type) 
        { 
            case "select-one": 
            case "select-multipe": 
                for (var j = 0, optLen = field.options.length; j < optLen; j++) 
                { 
                    var option = field.options[j]; 
                    if (option.selected) 
                    { 
                        var optValue = ""; 
                        if (option.hasAttribute) 
                        { 
                            optValue = (option.hasAttribute("value") ? option.value : option.text); 
                        } else { 
                            optValue = (option.attributes["value"].specified ? option.value : option.text); 
                        } 
                        parts.push(encodeURIComponent(field.name) + "=" + encodeURIComponent(optValue)); 
                    } 
                }  // www.jiaochengji.com
                break; 
            case undefined: 
            case "file": 
            case "submit": 
            case "reset": 
            case "button": 
                break; 
            case "radio": 
            case "checkbox": 
                if (!field.checked) 
                { 
                    break; 
                } 
            default: 
                parts.push(encodeURIComponent(field.name) + "=" + encodeURIComponent(field.value)); 
        } 
    } 
    return parts.join("&"); 
}