JavaScript to hide or select specific tabs in SharePoint Ribbon

<script type="text/javascript">// <![CDATA[

function ResetRibbon() {

try {

var ribbon = SP.Ribbon.PageManager.get_instance().get_ribbon();

SelectRibbonTab("Ribbon.Read", true);

ribbon.removeChild('Ribbon.ListForm.Display');

ribbon.removeChild('Ribbon.ListForm.Edit');

} catch (e)

{ }

}

SP.SOD.executeOrDelayUntilScriptLoaded(function () {

try

{

var pm = SP.Ribbon.PageManager.get_instance();

pm.add_ribbonInited(function () {

ResetRibbon();

});

var ribbon = null;

try {

ribbon = pm.get_ribbon();

}

catch (e) { }

if (!ribbon) {

if (typeof (_ribbonStartInit) == "function")

_ribbonStartInit(_ribbon.initialTabId, false, null);

}

else {

ResetRibbon();

}

},

"sp.ribbon.js");

}catch(e)

{}

// ]]></script>

<script type="text/javascript">

function ResetRibbon() {

try {

var ribbon = SP.Ribbon.PageManager.get_instance().get_ribbon();

SelectRibbonTab("Ribbon.Read", true);

ribbon.removeChild("Ribbon.ListForm.Display");

ribbon.removeChild("Ribbon.ListForm.Edit");

} catch (e)

{ }

}

SP.SOD.executeOrDelayUntilScriptLoaded(function () {

try {

var pm = SP.Ribbon.PageManager.get_instance();

pm.add_ribbonInited(function () {

ResetRibbon();

});

var ribbon = null;

try {

ribbon = pm.get_ribbon();

}

catch (e) { }

if (!ribbon) {

if (typeof (_ribbonStartInit) == "function")

_ribbonStartInit(_ribbon.initialTabId, false, null);

}

else {

ResetRibbon();

}

} catch (e)

{ }

}, "sp.ribbon.js");

</script>