🚀 go-pugleaf

I would prefer this one:

//User Dialog
with(myDialog = app.dialogs.add({name:"Add rectangle to pagesize", canCancel:true})){
myDialogColumn = dialogColumns.add()

//Defined colors of the document
docColors = new Array();
docColors[0] = "None"
for(i=0; i<app.colors.length; i++){ docColors[i+1] = app.colors[i].name; } //Defined stroke styles of the document docStrokes = new Array(); for(i=0; i<app.strokeStyles.length; i++){ docStrokes[i] = app.strokeStyles[i].name; }

with(myDialogColumn){
    with(borderPanels.add()){
      with(myColumn = dialogColumns.add()){
        with(myRow = dialogRows.add()){
          staticTexts.add({staticLabel:"fill color:"});
          myFillColor = dropdowns.add({stringList: docColors, selectedIndex: 0});
        }
        with(myRow = dialogRows.add()){
          staticTexts.add({staticLabel:"stroke color:"});
          myStrokeColor = dropdowns.add({stringList: docColors, selectedIndex: 0});
        }
        with(myRow = dialogRows.add()){
          staticTexts.add({staticLabel:"stroke style:"});
          myStrokeStyle = dropdowns.add({stringList: docStrokes, selectedIndex: 0});
        }
        with(myRow = dialogRows.add()){
          staticTexts.add({staticLabel:"stroke weight:"});
		 		myStrokeWeight = integerEditboxes.add({editContents: "1"});
        }
      }
    }
  }
}

if(app.documents.length > 0){
  //Show the dialog
  myReturn = myDialog.show();
  if(myReturn){
    var myDoc = app.activeDocument;
    var bounds = new Array(0, 0, myDoc.documentPreferences.pageHeight, myDoc.documentPreferences.pageWidth);
    myDoc.pages[0].rectangles.add({geometricBounds: bounds, strokeWeight: myStrokeWeight.editContents, strokeType: app.activeDocument.strokeStyles[myStrokeStyle.selectedIndex], strokeColor: docColors[myStrokeColor.selectedIndex], fillColor: docColors[myFillColor.selectedIndex]});
    myDialog.destroy();
    //Add 4 Guides
    myDoc.guides.add({orientation: HorizontalOrVertical.horizontal, location: 2});
    myDoc.guides.add({orientation: HorizontalOrVertical.horizontal, location: myDoc.documentPreferences.pageHeight-2});
    myDoc.guides.add({orientation: HorizontalOrVertical.vertical, location: 2});
    myDoc.guides.add({orientation: HorizontalOrVertical.vertical, location: myDoc.documentPreferences.pageWidth -2});
    }
  }else{
  alert("No document open!");
  }

Daniel