function niepuste(x){return x>'' && x!='wybierz'}

function ismail(e){return /^[\w\.-]{2,}@[\w\.-]+\.[a-z]{2,5}$/i.test(e)}

function validate(f,v,a,x){
 for(a=0;x=f[a++];)
  if((v=window[x.getAttribute('valid')])&&!v(x.value))
   {alert(x.getAttribute('alert'));return!x.focus()}
}

function showimage(url, width, height)
{
 var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=no,menubar=no');
}

function show(url, width, height)
{
 var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=yes,menubar=no');
}

function toggle( targetId ){
  if (document.getElementById){
  		target = document.getElementById( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} else {
  				target.style.display = "none";
  			}
  	}
}