var verder = "";
function isEmpty(field)
{
	with (field)
	{
		if (value==null||value=="")
		{
			field.className = "f1error";
			verder = "nee";
		}
		else
		{
			field.className = "f1";
		}
	}
}

function validate(thisform)
{
	verder = "";
	with (thisform)
	{
		isEmpty(firstName);
		isEmpty(name);
		isEmpty(email);
		isEmpty(username);
		isEmpty(password);
		isEmpty(address);
		isEmpty(postalCode);
		isEmpty(city);
	}
		  
	if(verder == "nee")
	{
		document.getElementById('errorMsg').style.display = 'block';
		scroll(0,0);
		return false;
		
	}
	else
	{
		return true;
	}
}



function validateForumThread(thisform)
{
	verder = "";
	with (thisform)
	{
		isEmpty(titel);
		
		var textarea = tinyMCE.get('bericht').getContent(); 
        if ( (textarea=="") || (textarea==null) ) 
        {
        	verder = "nee";
        }
	}
		  
	if(verder == "nee")
	{
		document.getElementById('errorMsg').style.display = 'block';
		scroll(0,0);
		return false;
		
	}
	else
	{
		return true;
	}
}



function validateForumPost(thisform)
{
	verder = "";
	with (thisform)
	{
		var textarea = tinyMCE.get('bericht').getContent(); 
        if ( (textarea=="") || (textarea==null) ) 
        {
        	verder = "nee";
        }
	}
		  
	if(verder == "nee")
	{
		document.getElementById('errorMsg').style.display = 'block';
		scroll(0,0);
		return false;
		
	}
	else
	{
		return true;
	}
}



function validateAgenda(thisform)
{
	verder = "";
	with (thisform)
	{
		isEmpty(firstName);
		isEmpty(name);
		isEmpty(email);
		isEmpty(address);
		isEmpty(postalCode);
		isEmpty(city);
	}
		  
	if(verder == "nee")
	{
		document.getElementById('errorMsg').style.display = 'block';
		scroll(0,0);
		return false;
		
	}
	else
	{
		return true;
	}
}



function letternumber(e)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);
keychar = keychar.toLowerCase();

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// alphas and numbers
else if ((("abcdefghijklmnopqrstuvwxyz0123456789").indexOf(keychar) > -1))
   return true;
else
   return false;
}