function disableButton(elt)
{
	elt = EL(elt);
	
	if( elt == null )
	{
		return;
	}
	
 	Valraiso.util.changeOpacity(elt, 20);
 	
 	elt.onclicksave = elt.onclick;
 	elt.onclick = function() {};

 	
    if( elt.href != null )
    {
    	elt.hrefsave = elt.href;
    	elt.href= "javascript: void(0);";
    }
    
	elt.cursorsave = elt.style.cursor;
    elt.style.cursor = "default";
}

function enableButton(elt)
{
	elt = EL(elt);
	
	if( elt == null )
	{
		return;
	}
	
	Valraiso.util.changeOpacity(elt, 100);
	
	elt.style.filter = "";
	
	elt.onclick = elt.onclicksave;

    if( elt.hrefsave != null )
    {
    	elt.href = elt.hrefsave;
    }
    
	elt.style.cursor = 	elt.cursorsave;	
}

function logoutClient()
{
	var form = EL('logoutClient');
	form.submit();
}