function preview_image(img_src) {
    pic = new Image();
    pic.src = img_src;
    setTimeout('view_image(pic.src, pic.width, pic.height);', 500);
}

function view_image(img_src, img_width, img_height){
    if (img_width>screen.availWidth-150 || img_width==0) {
        win_width = screen.availWidth-150;
    } else {
        win_width = img_width+40;
    }
    if (img_height>screen.availHeight-150 || img_height==0) {
        win_height = screen.availHeight-150;
    } else {
        win_height = img_height+20;
    }
    win_top  = Math.abs((screen.availHeight - win_height)/3);
    win_left = Math.abs((screen.availWidth -win_width)/3);
    photoWindow = window.open('', 'image', "top="+win_top+',left='+win_left+",width="+win_width+',height='+win_height+",resizable,scrollbars");
    photoWindow.document.write('<html><head><title>ÑÏ &laquo;ÎÑÍÎÂÀ-ÑÎËÑÈÔ&raquo;</title>');
    photoWindow.document.write('<scr'+'ipt type=text/javascript>');
    photoWindow.document.write('document.onkeypress = function CloseOnEsc(key) { if(document.all) { var keyCode = window.event.keyCode; } else { if (key.which == 0) {window.close();return;}   }  if (keyCode == 27) {window.close();return;} }');
    photoWindow.document.write('</scr'+'ipt>');
    photoWindow.document.write('</head><body style="margin: 0; padding: 0; background: #fff;"><table cellpadding="0" cellspacing="0" width="100%" height="100%"><tr><td align="center"><img src="'+img_src+'" ');
    if ( (img_width>1) && (img_height>1) ) {
        photoWindow.document.write('width="'+img_width+'" height="'+img_height+'"');
    }
    photoWindow.document.write(' border="0" onclick="window.close();">');
    photoWindow.document.write('</td></tr></table></body></html>');
    photoWindow.document.close();
    photoWindow.focus();
}