var myPage = myPara.parentTextFrames[0].parent; 

function getPage(myObject)    
{    
	if (!myObject) {    
		alert("Overflow!")     
		exit();  
		}  
	if ((myObject.constructor.name == "Page") || (myObject.constructor.name == "Spread"))     
		return myObject     
	if ((myObject.constructor.name == "Character")   
		|| (myObject.constructor.name == "InsertionPoint")     
		|| (myObject.constructor.name == "Word")     
		|| (myObject.constructor.name == "Line")     
		|| (myObject.constructor.name == "TextRange"))     
		{    
			if ((app.version +"").substr(0,1) == "4") return getPage(myObject.parentTextFrames[0])     
			else if  ((app.version +"").substr(0,1) == "3") return getPage(myObject.parentTextFrame)    
		}    
	return getPage(myObject.parent)     
}