ajax.js

一个用PHP编写的

/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 *
 * @version $Id: ajax.js 10385 2007-05-14 07:49:56Z cybot_tm $
 * @package phpMyAdmin-Designer
 */

/**
 *
 */
var http_request = false;
var xmldoc;
var textdoc;

/**
 *
 */
function makeRequest(url, parameters)
{
    http_request = false;
    if (window.XMLHttpRequest) {
        // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
        }
    } else if (window.ActiveXObject) {
        // IE
        try { http_request = new ActiveXObject("Msxml2.XMLHTTP"); }
        catch (e) {
            try { http_request = new ActiveXObject("Microsoft.XMLHTTP"); }
            catch (e) {}
        }
    }

    if (!http_request) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }

    http_request.onreadystatechange = alertContents;
    http_request.open('POST', url, true);
    http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    http_request.setRequestHeader("Content-length", parameters.length);
    http_request.setRequestHeader("Connection", "close");
    http_request.send(parameters);
    return true;
}

/**
 *
 */
function alertContents()
{
    if (http_request.readyState == 1) {
        document.getElementById("layer_action").style.left = (document.body.clientWidth + document.body.scrollLeft - 85) + 'px';
        document.getElementById("layer_action").style.top = (document.body.scrollTop + 10) + 'px';
        document.getElementById("layer_action").style.visibility = 'visible'; document.getElementById("layer_action").innerHTML = 'Loading...';
    }
    if (http_request.readyState == 2) {
        document.getElementById("layer_action").innerHTML = 'Loaded';
    }
    if (http_request.readyState == 3) {
        document.getElementById("layer_action").innerHTML = 'Loading 99%';
    }
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            textdoc = http_request.responseText;
            //alert(textdoc);
            xmldoc    = http_request.responseXML;
            PrintXML();
            //document.getElementById("layer_action").style.visibility = 'hidden';
        } else {
            alert('There was a problem with the request.');
        }
    }
}

function layer_alert(text)
{
    document.getElementById("layer_action").innerHTML = text;
    document.getElementById("layer_action").style.left = (document.body.clientWidth + document.body.scrollLeft - 20 - document.getElementById("layer_action").offsetWidth) + 'px';
    document.getElementById("layer_action").style.visibility = 'visible'; 
    setTimeout(function(){document.getElementById("layer_action").style.visibility = 'hidden';}, 2000);
}

/**
 *
 */
function PrintXML()
{
    var root = xmldoc.getElementsByTagName('root').item(0);    //root
    //alert(xmldoc.getElementsByTagName('root').item(1));
    if (root == null) {
        // if error
        myWin=window.open('','Report','width=400, height=250, resizable=1, scrollbars=1, status=1');
        var tmp = myWin.document;
        tmp.write(textdoc);
        tmp.close();
    } else {
        //alert(xmldoc.getElementsByTagName('root')[0]);
        //alert(root.attributes[0].nodeValue);
        //alert(xmldoc.getElementsByTagName('root')[0].attributes[0].nodeValue);
        //xmldoc.getElementsByTagName('root')[0].getAttribute("act")

        if (root.getAttribute('act') == 'save_pos') {
            layer_alert(strLang[root.getAttribute('return')]);
        }
        if (root.getAttribute('act') == 'relation_upd') {
            layer_alert(strLang[root.getAttribute('return')]);
            if (root.getAttribute('b') == '1') {
                contr.splice(root.getAttribute('K'), 1);
                Re_load();
            }
        }
        if (root.getAttribute('act') == 'relation_new') {
            layer_alert(strLang[root.getAttribute('return')]);
            if (root.getAttribute('b') == '1') {
                var i    = contr.length;
                var t1 = root.getAttribute('DB1') + '.' + root.getAttribute('T1');
                var f1 = root.getAttribute('F1');
                var t2 = root.getAttribute('DB2') + '.' + root.getAttribute('T2');
                var f2 = root.getAttribute('F2');
                contr[i] = new Array();
                contr[i][''] = new Array();
                contr[i][''][t2] = new Array();
                contr[i][''][t2][f2] = new Array();
                contr[i][''][t2][f2][0] = t1;
                contr[i][''][t2][f2][1] = f1;
                Re_load();
            }
        }
    }
}