function MenuOn(x){
  obj=document.getElementById("aktywnaTablica"+x).style.visibility="visible";
}
function MenuOff(x){
  obj=document.getElementById("aktywnaTablica"+x).style.visibility="hidden";
}
function SwitchWidocznosc(x){
	if(x == 1){
	    obj=document.getElementById("kopia1").style.visibility="hidden";
	    obj=document.getElementById("kopia2").style.visibility="visible";
	}else if(x == 2){
	    obj=document.getElementById("kopia2").style.visibility="hidden";
	    obj=document.getElementById("kopia1").style.visibility="visible";
	}
}
function setMenuOn(x){
  obj=document.getElementById("pozycjaMenu"+x).style.background="#DDDDDD";
}
function setMenuOff(x){
  obj=document.getElementById("pozycjaMenu"+x).style.background="";
}
function onCursorHand(cr){
	if (cr==1){document.body.style.cursor="pointer";
		//document.getElementById("sub").style.background="#dfdfdf";
	}else	{
	   document.body.style.cursor="default";
		//document.getElementById("sub").style.background="transparent";

	}
}

function dropReferer(){
   var divReferer = document.getElementById('refere');
   divReferer.innerHTML = document.referrer;
}

function sprawdzDane(){
		  // sprawdzmy temat
		  var chkTemat = 0;
		  objTemat = document.getElementById('temat');
		  if(objTemat.value.length > 1){
				chkTemat = 1;
		  }	

		  // przyjrzyjmy się nadawcy
		  objEmail = document.getElementById('email');	

		  var checkEmail = "@ .";
		  var checkStr = objEmail.value;
		  var EmailValid = false;
		  var EmailAt = false;
		  var EmailPeriod = false;
		  var EmailSpace = false;
			
		  for (i = 0;  i < checkStr.length;  i++){
		  	  ch = checkStr.charAt(i);
			  for (j = 0;  j < checkEmail.length;  j++){
			  	  if (ch == checkEmail.charAt(j) && ch == "@") EmailAt = true;
				  if (ch == checkEmail.charAt(j) && ch == ".") EmailPeriod = true;
				  if (ch == checkEmail.charAt(j) && ch == " ") EmailSpace = true;
				  if (EmailAt && EmailPeriod && (!EmailSpace)) break;
				  if (j == checkEmail.length) break;
			  }
			  // if both the @ and . were in the string
			  if (EmailAt && EmailPeriod && (!EmailSpace)){
				  EmailValid = true
				  break;
			  }
		  }
		  if(chkTemat == 0){
		  	 objTemat.style.border=" 1px solid #FFCC00";	
		  }else if (!EmailValid){
		  	 objEmail.style.border=" 1px solid #FFCC00";
		  }
			
		  if( (EmailValid) && (chkTemat) ){
		    objChkDane = document.getElementById('chkDane');	
			 objChkDane.value=1;
		  }	
						
		



}