var Browser = navigator.userAgent.toLowerCase();
var is_opera  = (Browser.indexOf('opera') != -1);
var is_saf    = ((Browser.indexOf('applewebkit') != -1) || (navigator.vendor == "Apple Computer, Inc."));
var is_webtv  = (Browser.indexOf('webtv') != -1);
var is_ie     = ((Browser.indexOf('msie') != -1) && (!is_opera) && (!is_saf) && (!is_webtv));
var is_ie4    = ((is_ie) && (Browser.indexOf("msie 4.") != -1));
var is_moz    = ((navigator.product == 'Gecko') && (!is_saf));
var is_kon    = (Browser.indexOf('konqueror') != -1);
var is_ns     = ((Browser.indexOf('compatible') == -1) && (userAgent.indexOf('mozilla') != -1) && (!is_opera) && (!is_webtv) && (!is_saf));
var is_ns4    = ((is_ns) && (parseInt(navigator.appVersion) == 4));


function ValidateMessage(message,alerttext)
{
	if (is_kon || is_saf || is_webtv)
	{
		return true;
	}

	if (message.length < 1)
	{
		alert(alerttext);
		return false;
	}
	return true;
}

function CheckLength(message,alerttext,minlength,maxlength)
{
	if(message.length > minlength && message.length < maxlength)
		return true;
	else
	{
		alert(alerttext);
		return false;
	}
}

function get_object(objname)
{
	if (document.getElementById) {
		var obj = document.getElementById(objname);
	}
	else if (document.all) {
		var obj = document.all[objname];
	}
	else if (document.layers) {
		var obj = document.layers[objname];
	}
	return obj;
}


var tipWin = null;

function opentip1()
{
        str="user_referals.php?ebene=1";
        tipWin = window.open(str,'tipWin','width=800,height=800,resizeable=yes,scrollbars=yes');
        window.open(str,'tipWin','width=800,height=800');
        tipWin.opener = self;
}

function opentip2()
{
        str="user_referals.php?ebene=2";
        tipWin = window.open(str,'tipWin','width=800,height=800,resizeable=yes,scrollbars=yes');
        window.open(str,'tipWin','width=800,height=800');
        tipWin.opener = self;
}

function opentip3()
{
        str="user_referals.php?ebene=3";
        tipWin = window.open(str,'tipWin','width=800,height=800,resizeable=yes,scrollbars=yes');
        window.open(str,'tipWin','width=800,height=800');
        tipWin.opener = self;
}