function getProjectList(category) {             
    
    var http_request = false;
    var vars = 'category='+category;
    var url = '/mods/requests/get_project_list.php';
    
    if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    
        http_request = new XMLHttpRequest();
        
    } 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('Ошибка отправки запроса. Проверьте, включена ли поддержка java в Вашем броузере.');
        return false;
    }
    
    http_request.onreadystatechange = function() { printProjectList(http_request, category); };    
    http_request.open('POST', url, true);
    http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    http_request.send(vars);
}

function printProjectList(http_request, category) {
    if (http_request.readyState == 4) {
        
        if (http_request.status == 200) {
            
            if (document.getElementById('list-container')) {
            
                document.getElementById('list-container').innerHTML = http_request.responseText;
                                        
                if (category) {
                    document.getElementById('em_0').innerHTML = '';
                    for (var key in cats) document.getElementById('em_'+cats[key]).innerHTML='';
                    document.getElementById('em_'+category).innerHTML = '+';
                } else {
                    for (var key in cats) document.getElementById('em_'+cats[key]).innerHTML='';
                    document.getElementById('em_0').innerHTML = '+';
                }
            
            }

        } else {
            
            //alert('Server Error.'+http_request.status);   
            
        }
    }  
    
}

    function save_tab(tab) {
        
        var http_request = false;
        var vars = 'tab='+tab;
        var url = '/mods/requests/save_tab.php';
        
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
        
            http_request = new XMLHttpRequest();
            
        } 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('Ошибка отправки запроса. Проверьте, включена ли поддержка java в Вашем броузере.');
            return false;
        }
        
        http_request.onreadystatechange = function() { tab_saved(http_request); };    
        http_request.open('POST', url, true);
        http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        http_request.send(vars);        
    }
    
    function tab_saved(http_request) {
        if (http_request.readyState == 4) {
            
            if (http_request.status == 200) {
            

            } else {
                
                //alert('Server Error.'+http_request.status);   
                
            }
        }  
        
    }