<!--

function chkFormular()
{

	var f=document.sup;
		
	if(f.username.value=="") 
	{
		alert('Fill in the Username!');
		f.username.focus();
		return false;
	}
	
	if(f.fullname.value=="") 
	{
		alert('Fill in the Fullname!');
		f.fullname.focus();
		return false;
	}
	
	if(f.comment.value=="") 
	{
		alert('Fill in the Comment!');
		f.comment.focus();
		return false;
	}
	
	if(f.email.value=="") 
	{
		alert('Fill in the Email Address!');
		f.email.focus();
		return false;
	}
	if(f.email.value != "") {
		if(f.email.value.indexOf('@') == -1) {
			alert("The Email Address has a wrong format.");
			f.email.focus();
			return false;
			}
		}

}
//-->