// text properties
var textRuns = {
	initialAttrs:{
		alignment:"right",
		antiAliasSharpness:192,
		antiAliasStrength:64, 
		baselineShift:0,
		bold:false, 
		face:"Arial", 
		fillColor:"#000000", 
		horizontalScale:1, 
		italic:false, 
		leading:1, 
		leadingMode:"percentage", 
		overSample:8, 
		paragraphIndent:0, 
		paragraphSpacingAfter:0, 
		paragraphSpacingBefore:0, 
		rangeKerning:0, 
		size:"12pt", 
		underline:false
	},
	textRuns:[
		{
			changedAttrs:{},
			characters:"" 
		}
	]
};
text_prefix = "Page ";	// page number prefix; if empty ("") only numbers will be created
alignment = "BR";	// alignment: "T", "B", "L". "R". "TL", "TR", "BL", "BR" (top, bottom, left, right, etc)

// padding properties
padding_x = 3;	// pixels from left or right edge of document
padding_y = 3;	// pixels from top or bottom edge of document



// Operation
var dom = fw.getDocumentDOM();
var n = dom.frames.length;
var startFrame = dom.currentFrameNum;
alignment = alignment.toUpperCase();
switch(alignment){
	case "T":
	case "B":
		textRuns.initialAttrs.alignment = "center";
	default:
		textRuns.initialAttrs.alignment = (alignment.indexOf("L") != -1) ? "left" : "right";
}
// add text to each frame
while (n--){
	dom.currentFrameNum = n;
	dom.addNewText({left:0, top:0, right:0, bottom:0}, true);
	dom.setTextOrientation("horizontal left to right");
	dom.setFillEdgeMode("antialias", 0);
	dom.setTextAntiAliasing("smooth");
	dom.setTextAutoKern(true);
	dom.setTextAutoExpand(true);
	textRuns.textRuns[0].characters = text_prefix + (n+1);
	dom.setTextRuns(textRuns);
	if (alignment.indexOf("L") != -1){
		fw.selection[0].rawLeft = dom.left+padding_x;
	}else if (alignment.indexOf("R") != -1){
		fw.selection[0].rawLeft = dom.left+dom.width-fw.selection[0].rawWidth-padding_x;
	}else{
		fw.selection[0].rawLeft = dom.left+dom.width/2-fw.selection[0].rawWidth/2;
	}
	if (alignment.indexOf("T") != -1){
		fw.selection[0].rawTop = dom.top+padding_y;
	}else if (alignment.indexOf("B") != -1){
		fw.selection[0].rawTop = dom.top+dom.height-fw.selection[0].rawHeight-padding_y;
	}else{
		fw.selection[0].rawTop = dom.top+dom.height/2-fw.selection[0].rawHeight/2;
	}
}
// return to frame started script on
dom.currentFrameNum = startFrame;