var myDoc =app.activeDocument; 
var seite = app.activeWindow.activePage.name-1;   
var myOStyle = app.activeDocument.objectStyles.item('Tab_Rot'); 
 
var myObjects=myDoc.pages[seite].masterPageItems; 
for (i=0;i<myObjects.length;i++){ 
if (myObjects[i].label=="Tab"){ 
myObjects[i].override(myDoc.pages[seite]); 
myObjects[i].applyObjectStyle(myOStyle,  true); 
} 
} 

var myDoc = app.activeDocument; 
var seite = app.activeWindow.activePage.name - 1; 
var myOStyle = app.activeDocument.objectStyles.item( 'Tab_Rot' ); 
var looser = null; // gelöste Musterseitenobjekte 
 
var myObjects = myDoc.pages[ seite ].masterPageItems; 
for ( i = 0; i < myObjects.length; i++ ) 
{ 
    if ( myObjects[i].label == "Tab" ) 
    { 
        looser = myObjects[i].override( myDoc.pages[ seite ] ); 
        looser.applyObjectStyle( myOStyle, true ); 
    } 
} 

myObjects[i].override( myDoc.pages[ seite ] ).applyObjectStyle( myOStyle, true ); 

var curDoc = app.activeDocument; 
var nPages = curDoc.pages.length; 
var OStyle = app.activeDocument.objectStyles.itemByName("Tab_Rot"); 
 
for (var p=0; p<nPages; p++) { 
	var allObjects = curDoc.pages[p].masterPageItems; 
	var nObjects   = allObjects.length; 
	for (n=0; n<nObjects; n++) { 
		var actObj = allObjects[n]; 
		if (actObj.label == "Tab"){ 
			var curObj = actObj.override(curDoc.pages[p]); 
			curObj.applyObjectStyle(OStyle, true); 
			break; 
		} 
	} 
} 

activePage.name-1 

activePage.documentOffset 

var myObjects=app.activeWindow.activePage.masterPageItems; 

var pagesOfActiveSpreadArray =  
app.activeWindow.activeSpread.pages.everyItem().getElements(); 

var myDoc = app.activeDocument;  
var pagesOfActiveSpreadArray = app.activeWindow.activeSpread.pages.everyItem().getElements();  
var myOStyle = app.activeDocument.objectStyles.item( 'Tab_Rot' );  
var looser = null; // gelöste Musterseitenobjekte  
 
 
 for(var j=0;j < pagesOfActiveSpreadArray.length; j++)   
    {  
var seite = pagesOfActiveSpreadArray[j].name-1; 
var myObjects = myDoc.pages[ seite ].masterPageItems;  
for ( i = 0; i < myObjects.length; i++ )  
{  
    if ( myObjects[i].label == "Tab" )  
    {  
        looser = myObjects[i].override( myDoc.pages[ seite ] );  
        looser.applyObjectStyle( myOStyle, true );  
    }  
}  
 
} 

var myDoc = app.activeDocument;   
var pagesOfActiveSpreadArray = app.activeWindow.activeSpread.pages.everyItem().getElements(); 
var myOStyle = app.activeDocument.objectStyles.item( 'Tab_Rot' );   
var looser = null; // gelöste Musterseitenobjekte   
  
  
for(var j=0; j < pagesOfActiveSpreadArray.length; j++)    
{   
	var seite = pagesOfActiveSpreadArray[j]; 
	var myObjects = seite.masterPageItems; 
	 
	for ( i = 0; i < myObjects.length; i++ )   
	{   
		if ( myObjects[i].label == "Tab" )   
		{   
			looser = myObjects[i].override( seite );   
			looser.applyObjectStyle( myOStyle, true );   
		}; 
	}; 
  
}