spread.getActiveSheet().bind(GC.Spread.Sheets.Events.CellClick, function (e, info) 
{
     if(info.sheetArea ===GC.Spread.Sheets.SheetArea.viewport)
   {
     console.log("Clicked cell index (" + info.row + "," + info.col + ")");
    
     /* Acquire the coordinate information of regular cells which exist at 
     the specified index position */

     var cellRect = spread.getActiveSheet().getCellRect(info.row, info.col);
     console.log("X coordinate:" + cellRect.x);
     console.log("Y coordinate:" + cellRect.y);
     console.log("Cell width:" + cellRect.width);
     console.log("Cell height:" + cellRect.height);
     }
 });