function showOtherBox() {
	var oSel = document.getElementById('selSources');
	var sourceId = oSel.options[oSel.selectedIndex].value; 
	var oDiv = document.getElementById('div-other');
	
	if (sourceId == 6 || sourceId == 7 || sourceId == 13 || sourceId == 14) {
		oDiv.style.display = "none";
	} else {
		document.getElementById('otherText').value = '';
		document.getElementById('span1').style.display = "none";
		document.getElementById('span2').style.display = "none";
		document.getElementById('span3').style.display = "none";
		document.getElementById('span4').style.display = "none";
		document.getElementById('span5').style.display = "none";
		document.getElementById('span8').style.display = "none";
		document.getElementById('span9').style.display = "none";
		document.getElementById('span10').style.display = "none";
		document.getElementById('span11').style.display = "none";
		document.getElementById('span12').style.display = "none";
		document.getElementById('span15').style.display = "none";
		document.getElementById('span' + sourceId).style.display = "inline";
		oDiv.style.display = "block";
	}
}