var SubMenuTimeOut;

function showSubMenu(SubMenuId) {
	clearTimeout(SubMenuTimeOut);
	var SubMenu=document.getElementById(SubMenuId);
	SubMenu.style.display='block';
	return true;
}

function blurSubMenu(SubMenuId) {
	SubMenu=document.getElementById(SubMenuId);
	SubMenuTimeOut=setTimeout("SubMenu.style.display='none'", 500);
	return true;
}

function headerImgChange() {
	var randomImg=Math.ceil(Math.random()*4);
	var headerImgEl=document.getElementById('headerImg');
	headerImgEl.src="images/header_minis/0"+randomImg+".gif";
	var contentEl=document.getElementsByTagName('body')[0];
	var impspan=document.createElement("span");
	impspan.innerHTML="<a id=\"impress\" href=\"#\" onMouseOver=\"this.getElementsByTagName('div')[0].style.display='block';\" onMouseOut=\"this.getElementsByTagName('div')[0].style.display='none';\"><div>&nbsp;</div>Impressum</a>";
	contentEl.appendChild(impspan);
}