function conditional_display(bCondition) {
	if (bCondition) {
		return "";
	} else {
		return "none";
	}
}

function clearCombo(oCombo) {
	while(oCombo.options.length > 0) {
		oCombo.remove(0);
	}
}

function addOption(oCombo, value, text) {
	var oOption 	= document.createElement("OPTION");
	oOption.text	= text;
	oOption.value	= value;
	oCombo.options.add(oOption);
}

function comboGetSelectedText(oCombo) {
	for (i = 0; i < oCombo.options.length ; i++) {
		if (oCombo.options[i].selected) {
			return oCombo.options[i].text;
		}
	}
	return null;
}

function selectItemCombo(oCombo,sValue) {
		for (i = 0; i < oCombo.options.length ; i++) {
			if (oCombo.options[i].value == sValue) {
				oCombo.options[i].selected = true;
			}
		}
}