var blnDisplaySupported = ( document.getElementById || document.all );

function blocking( strId, strStyle ) {
	if ( blnDisplaySupported ) {
		if (document.getElementById) {
			document.getElementById( strId ).style.display = strStyle;
		}
		else if (document.all) {
			document.all[ strId ].style.display = strStyle;
		}
	}
}