function zipBoxFocus()
{
	var oBox = document.getElementById(zipTextBoxId);
	if( oBox.value == zipCodePrompt )
	{
		oBox.value = '';
	}
}

function zipBoxBlur()
{
	var oBox = document.getElementById(zipTextBoxId);
	oBox.value = TrimAll(oBox.value);
	if( oBox.value == '' )
	{
		oBox.value = zipCodePrompt;
	}
}