/*
    function generate_news_div >> Erzeugt einen HTML Div-Container mit den entsprechenden News
    
    news_id:         Fortlaufende Zahl von 1 bis max. 10
    news_img:        Pfadangabe zu einem 80x80 Pixel großen Bild (z.B. images/ast.jpg)
    news_date:    Datum der News: (z.B. "9th May, 2006");
    news_text:    Der eigentlich News-Text
    news_link:    Der Link zur News-Seite (das href)
*/
function generate_news_div(news_id, news_date, news_text, news_link) {
    output = news_html_template;
    
    output = output.replace('[[news_id]]', news_id);
    output = output.replace('[[news_date]]', news_date);
    output = output.replace('[[news_text]]', news_text);
    output = output.replace('[[news_link]]', news_link);
    
    document.write(output);
}

function generate_img_div(news_id, left_coord) {
    output = img_html_template;
    
    output = output.replace('[[news_id]]', news_id);
    output = output.replace('[[news_id]]', news_id);
    output = output.replace('[[left]]', left_coord);
    
    document.write(output);
}

news_html_template = '<div id="news[[news_id]]">';
news_html_template += '<span class="news-date">[[news_date]]</span><br /><a href="[[news_link]]" class="news-link">[[news_text]]</a>';
news_html_template += '</div>';

img_html_template = '<div style="z-index: 20; position: absolute; top: 360px; left: [[left]]px;" id="imgdiv[[news_id]]">';
img_html_template += '<img id="newsimg[[news_id]]" src="images/news/circle_open.gif" width="12" height="12" border="0" alt="" />';
img_html_template += '</div>';

// ----- BEGINN Dynamisch generierter Teil ---------------------------------------------

                generate_news_div(1, 'June 2008', 'New In-cylinder Pressure Sensors for Thermo-Dynamic Analysis Available', 'news_archive_21.php');
//                generate_img_div(1, 20);
                            generate_news_div(2, 'September 10th, 2007', 'Co-Operation on Turbine Combustion Monitoring.', 'news_archive_19.php');
//                generate_img_div(2, 40);
                            generate_news_div(3, 'August 17th, 2007', 'Once again Piezocryst has been nominated for the Fast Forward Award.', 'news_archive_18.php');
//                generate_img_div(3, 60);
            
// ------ ENDE Dynamisch generierter Teil ----------------------------------------------

// Konstanten
news_img_active = new Image();
news_img_active.src = 'images/news/circle_active.gif';

news_img_inactive = new Image();
news_img_inactive.src = 'images/news/circle_open.gif';

/*pos0 = 200;
pos1 = 270;
pos2 = 350;*/

pos0 = 370;
pos1 = 440;
pos2 = 520;

pos1_left = pos1;
pos2_left = pos2;

max_step = 20;
max_opac_step = 20;

speed = 20;
refresh_interval = 6000;

var news_arr = new Array();
    news_arr[1] = 1;
    news_arr[2] = 2;

ie5 = (document.all && document.getElementById);
moz = (!document.all && document.getElementById);

scroll_in_progress = false;

// Animations-Funktionen

function get_obj(idname) {
    if (document.getElementById) {
        return document.getElementById(idname);
    } else if (document.all) {
        return document.all[idname];
    } else if (document.layers) {
        return document.layers[idname];
    } else {
        return null;
    }
}
    
function set_obj_pos(obj, left_pos) {                
    if (obj) {
        obj.style.top = left_pos;
    }
}

function set_obj_opac(obj, value) {
    if (ie5) obj.filters.alpha.opacity = value;
    if (moz) obj.style.MozOpacity = value/100;
}

function fade(idx) {
    obj_name = 'news'+idx;
    obj = get_obj(obj_name);
    
    if (obj) {
        obj_opac = eval('fade'+idx);
        obj_target_opac = eval('fade'+idx+'_target');
        opac_diff = obj_opac - obj_target_opac;
        
        if (opac_diff!=0) {
            opac_step = (opac_diff<0) ? -max_opac_step : max_opac_step;
            
            if (opac_step==0) return;
            if (Math.abs(opac_step)<1) opac_step = opac_step/Math.abs(opac_step);
            
            obj_opac -= opac_step;
            
            obj_opac = Math.round(obj_opac);
                                                            
            if (obj_opac<0) obj_opac = 0;
            if (obj_opac>100) obj_opac = 100;
            
            set_obj_opac(obj, obj_opac);
            eval('fade'+idx+' = '+obj_opac);                        
            cmd = 'fade('+idx+');';
            setTimeout(cmd, speed*4);
        }
    }
}

function change_news_image() {
    news_img_idx_new = news_img_idx_old + 1;
    if (news_img_idx_new>max_news_idx) {
        news_img_idx_new = 1;
    }

    old_img = get_obj('newsimg' + news_img_idx_old);
    if (old_img) {
        old_img.src = news_img_inactive.src;
    }
    
    new_img = get_obj('newsimg' + news_img_idx_new);
    if (new_img) {
        new_img.src = news_img_active.src;
    }
    
    news_img_idx_old = news_img_idx_new;    
}

function do_step(idx, cur_pos, target_pos) {
    obj_name = 'news'+idx;
    obj = get_obj(obj_name);
    
    if (obj) {
        scroll_in_progress = true;
        cur_pos = parseInt(get_obj('news'+idx).style.top);
        target_pos = eval('pos'+idx+'_target');
        
        obj_opac = eval('fade'+idx);
        obj_target_opac = eval('fade'+idx+'_target');
        opac_diff = obj_opac - obj_target_opac;
        
        if (opac_diff!=0) {
            opac_step = opac_diff/5;
            
            if (opac_step==0) return;
            if (Math.abs(opac_step)<1) opac_step = opac_step/Math.abs(opac_step);
            
            obj_opac -= opac_step;
            
            obj_opac = Math.round(obj_opac);
                                                            
            if (obj_opac<0) obj_opac = 0;
            if (obj_opac>100) obj_opac = 100;
            
            set_obj_opac(obj, obj_opac);
            eval('fade'+idx+' = '+obj_opac);                                
        }
        
        diff = target_pos - cur_pos;

        if (Math.abs(diff)==0) {
            scroll_in_progress = false;
            eval('target_visibility = (pos'+idx+'_visibility) ? pos'+idx+'_visibility : false');
            if (target_visibility) {
                obj.style.visibility = target_visibility;
            }
            return true;
        }

        if (Math.abs(diff)>max_step) {
            step = (diff<0) ? -max_step : max_step;
        } else {
            step = Math.round(diff/2);
            if (Math.abs(step)<1) {
                step = diff;
            }
        }
        new_pos = cur_pos + step;
        set_obj_pos(obj, new_pos);
    }

    window.setTimeout('do_step('+idx+');', speed);
}

function news_move_up() {
    if (scroll_in_progress)    {
        return;
    }

    idx1 = news_arr[1];
//    idx2 = news_arr[2];
    
    if (idx1==max_news_idx)    {                    
        if (idx1==1) {
            return;
        }
        idx_down = 1;
    } else {
        idx_down = idx1 + 1;
        if (idx_down>max_news_idx)    {
            return;
        }
    }
    
    eval('pos'+idx_down+'_left = '+pos2+';');
    eval('pos'+idx_down+'_target = '+pos1+';');
    
    eval('pos'+idx1+'_target = '+pos0+';');
    
//    eval('pos'+idx1+'_visibility = "hidden";');
//    eval('pos'+idx2+'_visibility = "visible";');

    eval('fade'+idx1+' = 100');
    eval('fade'+idx1+'_target = 0');

//    eval('fade'+idx2+' = 100');
//    eval('fade'+idx2+'_target = 100');

    eval('fade'+idx_down+' = 0');
    eval('fade'+idx_down+'_target = 100');

    obj_news3 = get_obj('news'+idx_down);
    set_obj_opac(obj_news3, 0);
    obj_news3.style.top = pos2;
    obj_news3.style.visibility = 'visible';

    setTimeout('do_step('+idx_down+');', speed);
    setTimeout('do_step('+idx1+');', speed);
    fade(idx1);
//    fade(idx_right);

    news_arr[1] = idx_down;
//    news_arr[2] = idx_right;
}

function news_move_down() {
    if (scroll_in_progress)    {
        return;
    }

    idx1 = news_arr[1];
//    idx2 = news_arr[2];
    
    if (idx1==1) {
        if (idx1==max_news_idx) {
            return;
        }
        idx_up = max_news_idx;
    } else {
        idx_up = idx1 - 1;
        if (idx_up<0)    {
            return;
        }
    }
    
//    change_news_image();
    
    eval('pos'+idx1+'_target = '+pos2+';');
    eval('pos'+idx1+'_visibility = "hidden";');
    
    eval('pos'+idx_up+'_target = '+pos1+';');
    eval('pos'+idx_up+'_visibility = "visible";');

    eval('fade'+idx_up+' = 0');
    eval('fade'+idx_up+'_target = 100');

    eval('fade'+idx1+' = 100');
    eval('fade'+idx1+'_target = 0');

//    eval('fade'+idx2+' = 100');
//    eval('fade'+idx2+'_target = 0');

    obj_news3 = get_obj('news'+idx_up);
    set_obj_opac(obj_news3, 0);
    obj_news3.style.top = pos0;
    obj_news3.style.visibility = 'visible';

    setTimeout('do_step('+idx1+');', speed);
    setTimeout('do_step('+idx_up+');', speed);
    fade(idx_up);
//    fade(idx2);

    news_arr[1] = idx_up;
//    news_arr[2] = idx1;
}

function init() {
    max_news_idx = 0;

    obj = get_obj('news1');
    if (obj) {
        obj.style.top = pos1;
        max_news_idx++;
    }

    obj = get_obj('news2');
    if (obj) {
        obj.style.top = pos2;
        max_news_idx++;
    }

    for (i=2; i<100; i++) {
        obj = get_obj("news"+i);
        if (obj) {
            obj.style.top = pos2;
            obj.style.visibility = 'hidden';
            max_news_idx = i;
        } else {
            break;
        }
    }
    
    news_img_idx_old = 50;
//    change_news_image();
        
    scroll_in_progress = false;
    
    setInterval('news_move_down();', refresh_interval);
}

init();