function writeLink( who, link )
{
        document.write( '<a href="mailto:'+ who +'@ht4u.net">'+link+ '</a>&nbsp;' );
}
function flip(id, end)
{

        var temp = 'http://ht4u.net/images/'+id+end+'.gif';
        document.getElementById(id).src = temp
}
function flipReview(id, filename, path)
{
        var temp = 'http://www.hardtecs4u.com'+path+filename;
        document.getElementById(id).src = temp;
}
function showsub(category)
{
	var el = document.getElementById("submenu_"+category);
	if (!el)
		return;

	// hide others first
	// tabellen-version
	/*var trs = document.getElementById("submenu").getElementsByTagName("tr");
	for (var i = 0; i < trs.length; i++)
	{
		trs[i].style.display = "none";
		trs[i].style.visibility = "hidden";
	}*/
	// div-version
	var uls = document.getElementById("submenu").getElementsByTagName("ul");
	for (var i = 0; i < uls.length; i++)
	{
		uls[i].style.display = "none";
		//uls[i].style.visibility = "hidden";
	}

	el.style.display = "";
	el.style.visibility = "visible";
}
function hidesub(category)
{
	var el = document.getElementById("submenu_"+category);
	if (!el)
		return;

	el.style.display = "none";
	el.style.visibility = "hidden";
}
function hideallsubs()
{
	var container = document.getElementById("submenu");
	if (!container)
        	return;
	var uls = container.getElementsByTagName("ul");
	for (var i = 0, l = uls.length; i < l; i++)
	{
		uls[i].style.display = "none";
	}

	var container = document.getElementById("sublayout");
        if (!container)
                return;
        var uls = container.getElementsByTagName("ul");
        for (var i = 0, l = uls.length; i < l; i++)
        {
                uls[i].style.display = "none";
        }
}
function clearSearchText() {
	d=document;
	d.searchform.stichwort.value='';
}
function preload ( img )
{
 var temp = new Image();
   temp.src = img;
}