make a popup window for showing full image in Blogspot

in blog ,sometime you have to resize image for displaying in blog .But what happen if your reader want to see full picture of your image instead of thumbnal or resized ones ? To show full image in post ,you can make a pop-up window ,when reader move mouse's cursor over the picture , a pop-up with full image will be appeared . In Fandung blog ,I found this code . Thanks Fandung for this tip .Live