dhtmlxlayout_dhx_blue.css hide expande/collapse buttons table.dhtmlxLayoutPolyContainer_dhx_blue td.dhtmlxLayoutSinglePoly div.dhtmlxPolyInfoBar div.dhtmlxInfoButtonShowHide_hor { display: none; } table.dhtmlxLayoutPolyContainer_dhx_blue td.dhtmlxLayoutSinglePoly div.dhtmlxPolyInfoBarCollapsedVer div.dhtmlxInfoButtonShowHide_hor { display: none; } table.dhtmlxLayoutPolyContainer_dhx_blue td.dhtmlxLayoutSinglePoly div.dhtmlxPolyInfoBar div.dhtmlxInfoButtonShowHide_ver { display: none; } table.dhtmlxLayoutPolyContainer_dhx_blue td.dhtmlxLayoutSinglePoly div.dhtmlxPolyInfoBarCollapsedHor div.dhtmlxInfoButtonShowHide_ver { display: none; } dhtmlxlayout.js remove click logic from expand/collapse buttons this._buildSurface = function() { ... // remove or comment this (the whole function) bar.childNodes[4].onclick = function() { ... } remove dblclick from separators this._buildSurface = function() { ... // remove or comment this (the whole function) td.ondblclick = function() { ... }