function catchSelection()
{
    var selection = '';
    if (window.getSelection)
    {
	    selection = window.getSelection().toString();
    }
    else if (document.getSelection)
    {
	    selection = document.getSelection();
    }
    else if (document.selection)
    {
	    selection = document.selection.createRange().text;
    }
    return selection;
}

function tableLinesOn(pos)
{
	if (!document.getElementById) return;
	var id = document.getElementById('id' + pos );
	id.className = 'CellOn';
}

function tableLinesOff(pos)
{
	if (!document.getElementById) return;
	var id = document.getElementById('id' + pos );
	id.className = 'CellOff';
}