1.在一些前台应用中或AJAX应用的时候，我们经常会遇到填充或取得整个form的需求。如果一个个的值去复制，很显然。数十个字段，很难想象，情况惨不忍睹啊。污染了页面是小，可是加大啦劳动量。
 
可以参考下面的代码。有空的时候，可以自己动手写一个Jquery 的插件。2个方法，一个自动获取form中的值，这个方法意义不大，因为现有的jquery.form插件formSerial()方法做到了。但是该插件好像没有对form 控件进行填充的功能。 有空，研究下。
 
下面的代码，是从某网站copy下来的，仅为自己做个参考而已！
<!DOCTYPE html PUBLIC  "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
    <title></title> 

    <script type="text/javascript"> 
        function getFrmQryStr(frmID) { 
            var obj = eval("document." + frmID); 
            if (obj == null) 
                obj = document.getElementById(frmID); 
            if (obj == null) return ""; 
            var i, queryString = "", and = ""; 
            var item; // for each form's object 
            var itemValue; // store each form object's value 
            var frmtype = obj.nodeName.toUpperCase(); 
            if (frmtype == "FORM") { 
                for (i = 0; i < obj.length; i++) { 
                    item = obj.elements[i]; // get form's each object 
                    if (item != null && item.name != undefined && item.name != '') { 
                        if (item.type == 'select-one') { 
                            itemValue = item.options[item.selectedIndex].value; 
                        } 
                        else if (item.type == 'checkbox' || item.type == 'radio') { 
                            if (item.checked == false) { 
                                continue; 
                            } 
                            itemValue = item.value; 
                        } 
                        else if (item.type == 'button' || item.type == 'submit' || item.type == 'reset' || item.type == 'image') { 
                            continue; 
                        } 
                        else { 
                            itemValue = item.value; 
                        } 

                        itemValue = encodeURIComponent(itemValue); 
                        queryString += and + item.name + '=' + itemValue; 
                        and = "&"; 
                    } 
                } 
            } 
            else if (frmtype == "DIV") { 
                queryString = getFrmValues(obj); 
            } 
            return queryString; 
        } 

        function getFrmValues(obj) { 
            var item = null; 
            var itemValue = null; 
            var str = ""; 
            for (var i = 0; i < obj.childNodes.length; i++) { 
                item = obj.childNodes[i]; 
                if (item == null || item == undefined) continue; 
                if (item.name != undefined && item.name != null && item.name != '') { 
                    if (item.type == 'select-one') { 
                        itemValue = item.options[item.selectedIndex].value; 
                    } 
                    else if (item.type == 'checkbox' || item.type == 'radio') { 
                        if (item.checked == false) { 
                            continue; 
                        } 
                        itemValue = item.value; 
                    } 
                    else if (item.type == 'button' || item.type == 'submit' || item.type == 'reset' || item.type == 'image') { 
                        continue; 
                    } 
                    else { 
                        itemValue = item.value; 
                    } 
                    itemValue = encodeURIComponent(itemValue); 
                    if (str != "") str += "&"; 
                    str += item.name + '=' + itemValue; 
                } 
                if (item.childNodes.length > 0) { 
                    var temp = getFrmValues(item); 
                    if (temp != "") { 
                        if (str != "") str += "&"; 
                        str += temp; 
                    } 
                } 
            } 
            return str; 
        } 

        function getdata() { 
            var str = getFrmQryStr("div"); 
            alert(str); 
        } 
    </script> 

</head> 
<body> 
    <div> 
        <form id="frm" name="frm" action="" method="post"> 
        <div id="div"> 
            <input type="text" id="txt1" name="txt1" value="1" /> 
            <div> 
                <input type="text" id="txt2" name="txt2" value="2" /> 
                <select id="sel" name="sel"> 
                    <option value="hxh" selected="selected">China</option> 
                </select> 
                <input type="hidden" id="Text1" name="txt3" value="hidden" /> 
                <input type="checkbox" id="chk" name="chk" value="chk     " checked="checked" /> 
                <input type="radio" id="rad1" name="rad" value="1111" /> 
                <input type="radio" id="Radio1" name="rad" value="1222" /> 
                <input type="radio" id="Radio2" name="rad" value="13333" checked="checked" /> 
                <span> 
                    <input type="text" id="txt3" name="txt3" value="3" /></span> 
            </div> 
        </div> 
        <input type="text" id="txt4" name="txt4" value="4" /> 
        </form> 
        <input type="text" id="txt5" name="txt5" value="5" /> 
        <br /> 
        <button onclick="getdata()"> 
            Submit</button> 
    </div> 
</body> 
</html>