function wo(href,width,height)
{
	window.open(href,null,"height="+(height+50)+",width="+(width+40)+",status=no,toolbar=no,scrollbars=yes,resiable=1,menubar=no,left="+Math.floor((screen.width-width)/2)+",top="+Math.floor((screen.height-height)/2));
}

function wo2(href,width,height)
{
	window.open(href,1,"height="+(height+50)+",width="+(width+40)+",status=no,toolbar=no,scrollbars=yes,resiable=1,menubar=no,left="+Math.floor((screen.width-width)/2)+",top="+Math.floor((screen.height-height)/2));
}

function ays(address){
  if(confirm("Jste si jistý?")){
    window.location.href=address;
  }
}

function set_main(pict,pict_full,width,height){
  if(document.getElementById('main_pic')){
    document.getElementById('main_pic').src=pict;
    document.getElementById('main_a').href='JavaScript:wo("'+pict_full+'",'+width+','+height+')';
  }
}

function showhide(elementid) 
{
  if(document.getElementById(elementid).style.display=='block')
    document.getElementById(elementid).style.display = 'none';
  else
    document.getElementById(elementid).style.display = 'block';
}

function show(elementid) 
{
    document.getElementById(elementid).style.display = 'block';
}

function hide(elementid) 
{
    document.getElementById(elementid).style.display = 'none';
}