var idDom = 0;
var allDom = 0;
var layDom = 0;
var DHTML = 0;
var ObjektVorher = null;
var StapelVorher = 0;

if(document.getElementById){
	idDom = 1;
	DHTML = 1;
	}
	else {
		if(document.all) {
		 allDom = 1;
		 DHTML = 1;
		}
 		else {
  	browserVersion = parseInt(navigator.appVersion);
  		if((navigator.appName.indexOf('Netscape')!= -1)&&(browserVersion == 4)){
  	  	layDom = 1;
  	  	DHTML = 1;
  		}
 		}
	}

/* Umwandlung zu dem jeweiligen Dom typs von einzelnen Elementen */

function crossDom(stil,ObjID){
 if(idDom){
 	if(stil == 1){
  	return(document.getElementById(ObjID).style);
  }
  else{
  	return(document.getElementById(ObjID));
  }
 }
 if(allDom){
 	if(stil == 1){
  	return(document.all[ObjID].style);
  }
  else{
  	return(document.all[ObjID]);
  }
 }
 else{
 	if(layDom)
  {
   return(document.layers[ObjID]);
  }
 }
}
function center(obj){
	var width = f15();
	var widthObject = f2(obj);
	var left = (width - widthObject)/2;
	if(document.getElementById){
		document.getElementById(obj).style.left = left;
	}
	else {
		if(document.all) {
	 		document.all[obj].left = left;
		}else{
			browserVersion = parseInt(navigator.appVersion);
			if((navigator.appName.indexOf('Netscape')!= -1)&&(browserVersion == 4)){
				document.title.pageX = left;
  			}
		}
	}
}

function f2(ObjId){
	dom = crossDom(0,ObjId);
	if(dom.offsetWidth){
		return dom.offsetWidth;
	}
	if(layDOM){
		return dom.clip.width;
	}
	else{
		return (0);
	}
}

function f15(){
	if(window.innerWidth){
		return (window.innerWidth);
	}
	if(document.body.clientWidth != null){
		return (document.body.clientWidth);
	}
	else{
		return (null);
	}
}

function f8(ObjId){
	dom = crossDom(1,ObjId);
	dom.visibility = 'visible';
	if(ObjId == "sub_about"){
		f9("sub_media");
		f9("sub_faq");
	}else if(ObjId == "sub_media"){
		f9("sub_about");
		f9("sub_faq");
	}else{
		f9("sub_media");
		f9("sub_about");
	}
}

function f9(ObjId){
	dom = crossDom(1,ObjId);
	dom.visibility = 'hidden';
}