/**
 * --------------------------------------------------------------------------- *
 * Dateiname               : scroller.js
 * --------------------------------------------------------------------------- *
 * Copyright               : Jobware Online-Service GmbH
 *
 * Zur Zeit bearbeitet von : 
 * --------------------------------------------------------------------------- *
 * Bemerkungen:
 * --------------------------------------------------------------------------- *
 */

// Variablen initialisieren
var ScrollerHandle_IE       = ""; // Handle fuer den IE
var ScrollerHandle_NC       = ""; // Handle fuer den Netscape
var Scroller_Browser_IE     = ""; // Ist der Browser ein IE (automatisch)
var Scroller_Browser_NC6    = ""; // Ist der Browser ein Netscape (automatisch)
var Scroller_Browser_NC     = ""; // Ist der Browser ein Netscape (automatisch)
var ScrollerImages          = ""; // Bilder die gescrollt werden
var ScrollerWidth           = 0; // Breite des Scrollers
var T_ScrollerWidth         = 0; // Temporaere Breite des Scrollers
var ScrollerHeight          = 0; // Hoehe des Scrollers
var ScrollerSpeed           = 0; // Geschwindigkeit langsam (1) ...-> schnell (10)
var T_ScrollerSpeed         = 0; // Temporaere Geschwindigkeit des Scrollers
var Stop_ScrollerSpeed      = 0; // Temporaere Geschwindigkeit des Scrollers
var ScrollerBGColor         = "#ffffff"; // Hintergrundfarbe des Scrollers
var ScrollerStopOnMouseOver = 1; // Stoppen, wenn man mit der Mouse drauf geht

// Browser-Erkennung
function getScrollerBrowser() {
	Scroller_Browser_IE  = (document.all || document.getElementById);
	Scroller_Browser_NC6 = ((navigator.userAgent.toLowerCase()).indexOf("gecko") != -1);
	Scroller_Browser_NC  = document.layers;
}

// Plaziert den Image-Scroller in der HTML-Seite
function placeScroller(_ScrollerImages, _ScrollerWidth, _ScrollerHeight, _ScrollerSpeed, _ScrollerBGColor, _ScrollerStopOnMouseOver) {
	// Bildfolge vervollstaendigen
	ScrollerImages = ScrollerImages + "<nobr>";
	ScrollerImages = ScrollerImages + _ScrollerImages;
	ScrollerImages = ScrollerImages + "</nobr>";				

	// Einstellungen zuweisen
	ScrollerWidth           = _ScrollerWidth;
	ScrollerHeight          = _ScrollerHeight;
	ScrollerSpeed           = _ScrollerSpeed;
	ScrollerBGColor         = _ScrollerBGColor;
	ScrollerStopOnMouseOver = _ScrollerStopOnMouseOver;

	// Browsererkennung (IE oder Netscape)
	getScrollerBrowser();

	// Geschwindigkeit setzen
	if (Scroller_Browser_NC6) {
        ScrollerSpeed = ScrollerSpeed + 1; 
	}
	T_ScrollerSpeed    = ScrollerSpeed;
	Stop_ScrollerSpeed = (ScrollerStopOnMouseOver == 0 ? T_ScrollerSpeed : 0);
	
	// Scroller starten beim Starten des Fensters			
	window.onload = initScroller;
	
	// Scroller in abhaengigkeit des Browsers ausgeben				
	if (Scroller_Browser_IE || Scroller_Browser_NC)	{
		if (Scroller_Browser_NC6) {
        // Netscape
            document.write('<div style="position:relative;width:' + ScrollerWidth + ';height:' + ScrollerHeight + ';overflow:hidden;">');
			document.write('  <div style="position:relative;width:' + ScrollerWidth + ';height:' + ScrollerHeight + ';background-color:' + ScrollerBGColor + ';" onMouseover="T_ScrollerSpeed=Stop_ScrollerSpeed;" onMouseout="T_ScrollerSpeed=ScrollerSpeed;">');
			document.write('    <div id="scroller_ie" style="position:absolute;left:0;top:0">');
			document.write('    </div>');
			document.write('  </div>');
			document.write('</div>');
		}
		else if (Scroller_Browser_IE) {
        // Internet Explorer
			document.write('<div style="position:relative;width:' + ScrollerWidth + ';height:' + ScrollerHeight + ';overflow:hidden">');
			document.write('  <div style="position:absolute;width:' + ScrollerWidth + ';height:' + ScrollerHeight + ';background-color:' + ScrollerBGColor + '" onMouseover="T_ScrollerSpeed=Stop_ScrollerSpeed;" onMouseout="T_ScrollerSpeed=ScrollerSpeed;">');
			document.write('    <div id="scroller_ie" style="position:absolute;left:0;top:0;">');
			document.write('    </div>');
			document.write('  </div>');
			document.write('</div>');
		}
		else if (Scroller_Browser_NC) {
        // Netscape
			document.write('<ilayer width="' + ScrollerWidth + '" height="' + ScrollerHeight + '" name="scroller_nc" bgColor="' + ScrollerBGColor + '">');
			document.write('  <layer name="scroller_nc_2" left="0" top="0" onMouseover="T_ScrollerSpeed=Stop_ScrollerSpeed;" onMouseout="T_ScrollerSpeed=ScrollerSpeed;">');
			document.write('  </layer>');
			document.write('</ilayer>');
		}
    }
}

// Image-Scroller initialisieren
function initScroller() {
	var dorun = 0; // darf gescrollt werden
	
	// Je nach Browser den Scroller initialisieren
	if (Scroller_Browser_IE) {
        // Internet Explorer
		ScrollerHandle_IE           = (document.getElementById ? document.getElementById("scroller_ie") : document.all.scroller_ie);
		ScrollerHandle_IE.innerHTML = ScrollerImages;
        ScrollerHandle_IE.style.top = ScrollerHandle_IE.offsetHeight * (-1) + ScrollerHeight;
        T_ScrollerHeight            = (document.all ? ScrollerHandle_IE.offsetHeight : document.getElementById("scroller_ie").offsetHeight);
        
		// Scrollen erlaubt
		dorun = 1;
	}
	else if (Scroller_Browser_NC) {
        // Netscape
		ScrollerHandle_NC     = document.scroller_nc.document.scroller_nc_2;
		ScrollerHandle_NC.top = document.scroller_nc.document.scroller_nc_2 * (-1) -20 + ScrollerHeight;
		ScrollerHandle_NC.document.write(ScrollerImages);
		ScrollerHandle_NC.document.close();
		T_ScrollerHeight      = ScrollerHandle_NC.document.height;
		
		// Scrollen erlaubt
		dorun = 1;
	}
	
	// Scrollen
	// wurde verlangsamt
	if (dorun == 1) { setInterval("doScrolling()", 50); }
}

// Scrollen
function doScrolling() {
	if (Scroller_Browser_IE) {
		if (parseInt(ScrollerHandle_IE.style.top) < ScrollerHeight) { ScrollerHandle_IE.style.top = parseInt(ScrollerHandle_IE.style.top) + T_ScrollerSpeed; }					
		else { ScrollerHandle_IE.style.top = document.getElementById("scroller_ie").offsetHeight * (-1) - 10;	}
	}
	else if (Scroller_Browser_NC) {
		if (ScrollerHandle_NC.top < ScrollerHeight) { ScrollerHandle_NC.top += T_ScrollerSpeed;	}
		else { ScrollerHandle_NC.top = document.scroller_nc.document.scroller_nc_2 * (-1) - 20; }					
	}
}