function preloadImgs() {
 var d=document,a=arguments;
 if(!d.imgs) d.imgs=new Array();
 for(var i=0; i<a.length; i++) {
	 d.imgs[i]=new Image; d.imgs[i].src=a[i];
     }
}

function swapImg() {
 var doc=document,args=arguments,elm,n;
 doc.$imgSwaps=new Array();
 for(n=2; n<args.length; n+=2) {
	 elm=getObjectByID(args[n]); if(elm) {
		 doc.$imgSwaps[doc.$imgSwaps.length]=elm;
         elm.$src=elm.src; elm.src=args[n+1]; 
         } 
     }
}

function getObjectByID(id,o) {
 var c,el,els,f,m,n;
 if(!o)o=document;
 if(o.getElementById) el=o.getElementById(id);
 else if(o.layers) c=o.layers;
 else if(o.all) el=o.all[id];
 if(el) return el;
 if(o.id==id || o.name==id) return o;
 if(o.childNodes) c=o.childNodes;
 if(c) for(n=0; n<c.length; n++) {
	 el=getObjectByID(id,c[n]);
	 if(el) return el; 
	 }
 f=o.forms;
 if(f) for(n=0; n<f.length; n++) {
	 els=f[n].elements;
     for(m=0; m<els.length; m++){
		 el=getObjectByID(id,els[n]);
		 if(el) return el; 
		 } 
	 }
 return null;
}

function disableRightClick(e)
{
    var browser = navigator.appName.substring ( 0, 9 );
    var eventNumber = 0;
    if(browser=="Microsoft") eventNumber = event.button;
    else if(browser=="Netscape") eventNumber = e.which;
    if((eventNumber == 2) || (eventNumber == 3)) {
        alert('\nProgramm-Code und Abbildungen unterliegen dem Copyright !\n');
        return false;
    }
    return true;
}

function trapPageMouseEvents()
{
    var browser = navigator.appName.substring ( 0, 9 );
    document.onmousedown = disableRightClick;
    if(browser == "Netscape") document.captureEvents(Event.MOUSEDOWN);
}