how to select paths with the same stroke width

here you go

#target illustrator
// script.name = selectPathsThisSize.jsx;
// script.description = selects pathItems that have the same supplied stroke width; limited to 3 decimals;
// script.required = a document with at least one path item;
// script.parent = CarlosCanto // 6/5/11;
// script.elegant = false;
var idoc = app.activeDocument;
var strokewidth = prompt ("Enter Stroke Width in points of paths to be selected", 0.361, "Select Paths this size:___");
for (i=0 ; i< idoc.pathItems.length; i++)
     {
          var ipath = idoc.pathItems;
               if ( (ipath.strokeWidth).toFixed(3) == Number(strokewidth).toFixed(3))
                    {
                         ipath.selected = true;
                    }
     }
app.redraw();