var objScan = document.getElementById("DynamicWebTwain");
var count = objScan.HowManyImagesInBuffer;
objScan.SelectedImagesCount = count;
for (var i = 0; i < count; i++) {
if (browsertype == "ie")//The method SelectedImageIndex is different for Plugin and AcitveX.
objScan.SelectedImageIndex(i) = i;
else
objScan.SetSelectedImageIndex(i, i);
}
var size = objScan.GetSelectedImagesSize(0);