function winLoginOpen() {
    window.open('login.jsp','popup', 'width=400, height=255, toolbar=no, location=no, directories=no, status=no, menubar=no, resizable=no, scrollbars=no, copyhistory=no');
}

function setPng24(obj) { 
    var request_os = window.navigator.userAgent; 
    var os_array = request_os.split(";"); 

	if(os_array[1] != " MSIE 7.0") { 
        obj.width=obj.height=1; 
        obj.className=obj.className.replace(/png24/i,''); 
        obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"; 
        obj.src=''; 
    } 
    return ''; 
}

function regInvalidTopic() {
	if (confirm("Would you register for sure?"))
	{
		topic_form.submit();
	}
}