function NewWindow(mypage,myname,w,h,scroll){
  var win= null;
  var winl = (screen.width-w)/2-15;
  var wint = (screen.height-h-80)/2;
  var settings  ='height='+h+',';
      settings +='width='+w+',';
      settings +='top='+wint+',';
      settings +='left='+winl+',';
      settings +='scrollbars='+scroll+',';
      settings +='resizable=no';
  win=window.open(mypage,myname,settings);
  if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}

/*function disableselect(e){
	return false
}*/

function rkshow(io) {
	document.getElementById('sub01').style.display = 'none';
	document.getElementById('sub02').style.display = 'none';
	document.getElementById('sub03').style.display = 'none';
	document.getElementById(io).style.display = 'block';
}

function rkhide() {
	if(document.getElementById('sub01')) document.getElementById('sub01').style.display = 'none';
	if(document.getElementById('sub02')) document.getElementById('sub02').style.display = 'none';
	if(document.getElementById('sub03')) document.getElementById('sub03').style.display = 'none';
}

function reEnable(){
	return true
}
		
//if IE4+
//	document.onselectstart=new Function ("return false")
		
//if NS6
	if (window.sidebar){
		document.onmousedown=disableselect
		document.onclick=reEnable
	}
	
function zakaz(ev,rr){
if (ev.button == 2)
  {
        alert("Copyright © MB TOOL s.r.o.");
        return true;
  }
}	

function clearText(field){ 

    if (field.defaultValue == field.value) field.value = '';
    else if (field.value == '') field.value = field.defaultValue;

}