function CheckForm(self)
{
	if(navigator.product == 'Gecko') {
		document.getElementById("loginform").interface.value = 'mozilla';
	}
	else if(window.opera && document.childNodes) {
		document.getElementById("loginform").interface.value = 'opera7';
	}
	else if(navigator.appName == 'Microsoft Internet Explorer' && navigator.userAgent.indexOf("Mac_PowerPC") > 0) {
		document.getElementById("loginform").interface.value = 'konqueror';
	}
	else if(navigator.appName == 'Microsoft Internet Explorer' && document.getElementById && document.getElementById('ietest').innerHTML) {
		document.getElementById("loginform").interface.value = 'ie';
	}
	else if(navigator.appName == 'Konqueror') {
		document.getElementById("loginform").interface.value = 'konqueror';
	}
	else if(window.opera) {
		document.getElementById("loginform").interface.value = 'opera';
	}

	document.getElementById("loginform").target = 'mypopup';
	OpenPopup(self, '850', '600');

	return true;
}

// open chat in popup window
function OpenPopup(self, x, y)
{
	var values  = 'width='+x+', height='+y+', left=0, top=0,'
	values += 'dependent=no, hotkeys=no, resizable=yes, scrollbars=no, menubar=no'
	window.open(self, 'mypopup', values);
}

function PopupForm(myform, windowname)
{
if (! window.focus)return true;
window.open('', windowname, 'height=600, width=850, dependent=no, hotkeys=no, resizable=yes, scrollbars=no, menubar=no');
myform.target=windowname;
return true;
}