function user_login(user, password)
{
	var cook = "user="+user+"|"+password;
	document.cookie = cook;
	location.href = "kontakt";
}
function user_logout()
{
	var cook = "user=";
	document.cookie = cook;
	window.location.reload();
}
function lightup(imageobject, opacity)
{
	if (navigator.appName.indexOf("Netscape")!=-1){if(parseInt(navigator.appVersion)>=5)
		{imageobject.style.MozOpacity=opacity/100;}}
	else if (navigator.appName.indexOf("Microsoft")!=-1){if(parseInt(navigator.appVersion)>=4)
		{imageobject.filters.alpha.opacity=opacity;}}
}
function dir(pl)
{
	location.href = pl;
}
function check_display(value)
{
	var display_value = document.getElementById(value).style.display;
	if(display_value == "none"){document.getElementById(value).style.display = "";}
	else {document.getElementById(value).style.display = "none";}
}
function delete_checks(site, value_name, ver_var)
{
	if(ver_var == undefined){ver_var = "löschen";}
	var check = window.confirm(value_name+' wirklich '+ver_var+'?');
	if(check){location.href = site}else {}
}