<!--- browser type short cut variables --->
  msie = "Microsoft Internet Explorer";
  ne = "Netscape";
  browser = "undefined";

 
 if (navigator.appName == msie)
  {
	  browser = "msie";
	  ver = parseFloat(navigator.appVersion.substr 
	  (navigator.appVersion.lastIndexOf("MSIE") + 4, 4));
  }

  if (navigator.appName == ne)
  {
	  browser = "ne";
	  ver = parseFloat(navigator.appVersion.substr(0,4));
  } 
  
function a(numer){

	 
	  if (browser == 'msie')
	  {
		 document.getElementById(numer).style.visibility = "visible";		 
	  } 
	 
	  else{

 		 document.getElementById(1).style.visibility = "visible";
  		 document.getElementById(2).style.visibility = "visible";
  		 document.getElementById(3).style.visibility = "visible";
  		 document.getElementById(4).style.visibility = "visible";
  		 document.getElementById(5).style.visibility = "visible";
  		 document.getElementById(6).style.visibility = "visible";
  		 document.getElementById(7).style.visibility = "visible";
 		 document.getElementById(8).style.visibility = "visible";
  		 document.getElementById(9).style.visibility = "visible";
 		 document.getElementById(10).style.visibility = "visible";
 	  }
}

function kor_wiek(){
 if (document.form2.age.value.match(/\D/))  {
 	  document.form2.age.value =  document.form2.age.value.replace(/\D/g,"");  }

}

function przycisk(){

if (document.form2.email.value.indexOf("@")>0 && document.form2.email.value.length>3 && document.form2.text.value.length>1){ 
 document.form2.b_submit.disabled=false;
}else  document.form2.b_submit.disabled=true

}