//[!] ________________________________________________________________________________
function documentLayerShow( layerName ) {
	var layerID;
	layerID = document.getElementById( layerName );
	layerID.style.display='block';
}

//[!] ________________________________________________________________________________
function documentLayerHide( layerName ) {
	var layerID;
	layerID = document.getElementById( layerName );
	layerID.style.display='none';
}

//[!] ________________________________________________________________________________
function documentLayerHide_all() {
	//documentLayerHide( 'layer_menuLeft_1' );
	//documentLayerHide( 'layer_menuLeft_2' );
	//documentLayerHide( 'layer_content_3' );
}

//[!] ________________________________________________________________________________
function menuLeft_hideAll() {
	documentLayerHide( 'layer_menuLeft_1' );
	documentLayerHide( 'layer_menuLeft_2' );
	documentLayerHide( 'layer_menuLeft_3' );
	documentLayerHide( 'layer_menuLeft_4' );
	documentLayerHide( 'layer_menuLeft_5' );
}

//[!] ________________________________________________________________________________
function menuLeft_show( contentID ){
	menuLeft_hideAll();
	documentLayerShow( 'layer_menuLeft_' + contentID );
}