function pageStart() {
	window.onresize=setWBPLogo;
	setWBPLogo();
	document.getElementById('wbplogo').style.visibility = 'visible';
}

function setWBPLogo() {
	var bodycontainer = document.body;
	var wbplogocontainer = document.getElementById('wbplogo');

	var availablewidth = (bodycontainer.offsetWidth - 985) / 2;
	if(availablewidth < 146) {
		if(availablewidth < 0 )
			wbplogocontainer.style.right = (availablewidth * 2) - 149 + "px";
		else 
			wbplogocontainer.style.right =  "-" + (149 - Math.ceil(availablewidth)) + "px";
	} else
		wbplogocontainer.style.right = "0px";

	var logoheight = document.getElementById('mainlogo').offsetHeight;
	var pageheight = document.getElementById('mainmenu').offsetTop + document.getElementById('mainmenu').offsetHeight;
	if (pageheight < document.documentElement.clientHeight) pageheight = document.documentElement.clientHeight;
	var contentcontainer = document.getElementById('maincontent');
	if (contentcontainer.offsetHeight + logoheight < pageheight)
		bodycontainer.style.height = pageheight + "px";
	wbplogocontainer.style.bottom = "0px";
}

function changeMenuButton(e){
	var sourceelement;
	if (e.srcElement) sourceelement = e.srcElement;
	else sourceelement = e.target;
	if (sourceelement.src.search("_akt.jpg") > -1) sourceelement.src = sourceelement.src.replace(/_akt.jpg/,".jpg");
	else sourceelement.src = sourceelement.src.replace(/.jpg/,"_akt.jpg");
}