function mwzoom(zp,zt,imw,imh)
   {
      MWImage = window.open('','_blank','width='+(imw)+',height='+(imh)+',menu=0,navigate=0,statusbar=0,top='+(screen.height/2-imh/2)+',left='+(screen.width/2-imw/2)+'');

      with (MWImage.document)
      {
      open();
       writeln('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">');
       writeln('<html>');
       writeln('<head>');
       writeln('<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />');
       writeln('<meta http-equiv="Content-Language" content="cs" /> ');
       writeln('<title>'+zt+'</title>');  
       writeln('<style type="text/css"> ');
       writeln('body {margin-top: 0px;font-family: Verdana, \'Geneva CE\', lucida, sans-serif; margin: 0;padding: 0;color: #333333;background-color : #ffffff;text-align: center;}');
       writeln('h1 {padding:0px;margin:5px;font-weight:bold;font-size:10pt;color:#ff3300;}');
       writeln('img {cursor:pointer;}');
       writeln('.bt {font-size : 8pt;font-weight: bold;color:#ffffff;border-top: solid 1px #aaaaaa;border-bottom: solid 1px #666666;border-left: solid 1px #aaaaaa;border-right: solid 1px #666666;background: #888888;text-align: center;}');
       writeln('</style>');
       writeln('</head>');
       writeln('<body>');
       writeln('<h1>'+zt+'</h1>');
       writeln('<img src="'+zp+'" onclick="window.close();" />');
       writeln('<p style="text-align:center;"><input type="button" onclick="window.close()" value="zavří­t" class="bt" /></p>');  
       writeln('</body>\n</html>');
      close();
      }
      MWImage.focus();     
}
     
function fillempty(el,text,action)
{
 var vid = document.getElementById(el);
if(action==1)
{ 
   if(vid.value.length<1 || vid.value==text)
    {
     vid.value = '';
    } 
    
 }else if(action == 0){
 
   if(vid.value.length<1)
    { 
     vid.value = text;
    } 
 }
}
