首頁猿問 javaScript對form的操作

javaScript對form的操作

JavaScript

動(dòng)漫人物 2018-12-07 04:26:05

在DIV里我用了表單form 的post向數(shù)據(jù)庫提交數(shù)據(jù)后，服務(wù)器反饋回來一個(gè)xml文件，我想判斷我在文本框里輸入的值和我數(shù)據(jù)庫里面的值來個(gè)判斷，例如：判斷輸入的值是否在數(shù)據(jù)庫里，顯示出來。那我該如何判斷呢？？？？？ ? div中的代碼<form method="post" action="findit.php">??????????????? <div data-role="fieldcontain">??????????????????? ?<fieldset data-role="controlgroup">??????????????????????? ?<label for="textinput2">??????????????????????? ?</label>??????????????????????? ?<input placeholder="" value="" type="text" />??????????????????? ?</fieldset>??????????????? </div>??????????????? <a href="#page2"><input type="submit" value="開找" data-mini="true" />??????????????????? ??????????????? </a>??????????? ?</form> ? ? <script type="text/javascript"> ??????????? function createXmlHttpReq() { ??????????????? if(window.XMLHttpRequest) { ??????????????????? xmlHttpReq = new XMLHttpRequest(); ???????????????? ??????????????? } else { ???????????????? ??????????????????? xmlHttpReq = new ActiveXObject("MSXML2.XMLHTTP"); ???????????????? ??????????????? } ??????????????? return xmlHttpReq; ???????????? ??????????? } ??????????? ??????????? function processResponse() ???{ ??????????????? if(xmlHttpReq.readyState == 4) ????{ ??????????????????? if(xmlHttpReq.status == 200) ?????{ ???????????????????????????????????? /*var res = xmlHttpReq.responseText; ????????????????????????????????????? document.getElementById("message").innerHTML=res;???? */?????????? ??????????????????????? var msg = xmlHttpReq.responseXML;???????? ??????? ??????alert(xmlHttpReq.responseText);???????????????????? ????? } ???????????????? } ???????????? ???????????? } ??????????? ??????????? function sendRequest(url) { ???????????????? ??????????????? createXmlHttpReq(); ??????????????? xmlHttpReq.open("get",url,true);?????????????? ??????????????? xmlHttpReq.onreadystatechange=processResponse; ??????????????? xmlHttpReq.send(null); ???????????????? ??????????? } ????????????????? ???????????? ??????????? function doSubmit() { ???????????????? var name = document.getElementById("lgname").value;????? var pwd = document.getElementById("lgpwd").value;??????????????? var url =? 'login_chk.php?name='+name+'&pwd='+ pwd;????sendRequest(url); ??????????? } ???????? ???????? ??????? </script>

查看完整描述

4 回答

素胚勾勒不出你

TA貢獻(xiàn)1827條經(jīng)驗(yàn) 獲得超9個(gè)贊

var xmlDoc = xmlHttpReq.responseXML; 這之后繼續(xù)寫啊，responseXML 是個(gè)對象啊。

function processResponse() 
{ 
    if(xmlHttpReq.readyState == 4) 
    {
        if(xmlHttpReq.status == 200)
        {
            var xmlText = xmlHttpReq.responseText;
            var xmlDoc = xmlHttpReq.responseXml;
            xmlDoc.LoadXml(xmlText);
            var nodes = xmlDoc.getElementsByTagName("YourNodeName");
            if (nodes)
            {
                var node = nodes.items[0];
                //...
            }
        }
    }
}