Syntax: How to Show or Hide a Layer
IbComposer_showLayer(layerName,bShow);

where:

layerName

Alphanumeric

Is the name of the layer, which will be shown or hidden.

bShow

Is an operator that can be set to true to show the layer or false to hide it.
Top of page
Example: Showing or Hiding a Layer
 
function button1_onclick(event) {
   var eventObject = event ? event : window.event;
   var ctrl = eventObject.target ? eventObject.target :
   eventObject.srcElement;
   // TODO: Add your event handler code here
   IbComposer_showLayer('Customers','true');
}