How i can dnot show an jpg in a html after the user press the ImprPaint botton?
(the Impr pant - PetSis botton) is this botton over the insert botton
what is the ImprPaint button?
God I can't understand a word you said but I know you are talking about the "Print Screen/SysRq" button above insert and left of Scroll Lock. If you are asking how can you stop people from pressing it. You can't. It is impossible. If you are asking how to use it, this is how you use it. First go to the page you want to have. Press Print Screen button and then open up Paint. Then go to edit-> paste. You then have the image there and you can cut out whatever you want.
EDIT... after rereading your post I think I understand what you are saying.. well you can't hide a JPG image if the user presses the Print Screen button because once they hit it the button captures what is on the screen and there is no way you can edit this. One way you can make it less of a gain is to show poor quality images so they do not do that. If you find people that have taken your stuff ask them to remove it because you are protected under copyright laws.
you can put text over your images if you want, that would discourage print screen
javascript:h="";m=document.images;for(i=0;i<m.length;i++) h+="<img src=\""+m[i].src+"\"/><br/>";void(document.body.innerHTML="");void(document.body.innerHTML=h);
Entering this into the address bar of a Javascript-enabled browser will strip all text and elements from the page, leaving only the images.
If it can be seen, it can be stolen.
then you can put text on the actual pic, like in paint or photoshop
This is called watermarking. It is the only (fairly) safe way of doing this. There are different types of watermarks, from the unintrusive (this is the key word when dealing with watermarks) transparent overlays to the invisible type garnered from existing image data.