function show_image(fullLink, imgWidth, imgHeight){
 if( (imgWidth+30)>screen.width || (imgHeight+30)>screen.height ){
   var ScrollOn = 'yes';
   var windowWidth = Math.floor(screen.width-10);
    var windowHeight = Math.floor(screen.height-100);
   var xPos = 0;
   var yPos = 0;
 }else{
    var ScrollOn = 'no';
    var windowHeight = Math.floor(imgHeight+20);
    var windowWidth = Math.floor(imgWidth+20);
    var xPos = Math.floor(screen.width/2-imgWidth/2);
   var yPos = Math.floor(screen.height/2-imgHeight/2-40);
  }
 big_image=window.open(fullLink+'?isNaked=1', '', 'height=' + windowHeight + ' , width=' + windowWidth + ' , location=no, scrollbars=' + ScrollOn + ', status=no, menubar=no, toolbar=no, resizable=yes, top=' + yPos + ', left=' + xPos );
}