function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function openWindow(url, width, height, slide, foot) {
    if (!slide) slide = 'no';
    if (!foot) foot = 'no';
        var left = (screen.width-width)/2;
        var top = (screen.height-height)/2 - 35;
        window.open(url,"okno",'width='+ width +',height='+ height +',resizable=yes,scrollbars='+ slide + ',menubar=no,status=' +foot+',top='+top+',left='+left+'');
}

function check_form() {
    var error = 0;
    var error_message = "Popraw dane w formularzu\n\n";
    var realname = document.f.realname.value;
    var email = document.f.email.value;
    var content = document.f.content.value;

    if (!realname) {
        error_message = error_message + "* Podaj imię i nazwisko.\n";
        error = 1;
    }
    /*
    if (!email) {
        error_message = error_message + "* Podaj E-mail odbiorcy.\n";
        error = 1;
    }
    */
    if (email) {
    
        if (email == "" || email.length < 6) {
    	    error_message = error_message + "* Adres E-mail  musi mieć przynajmniej 6 zn.\n";
	}
	if (email.indexOf("@") == -1 || email.indexOf(".") == -1) {
            error_message = error_message + "* Adres E-mail odbiorcy nie jest poprawny.\n";
	    error = 1;
	}	    		    
    }
    if (!content) {
        error_message = error_message + "* Podaj treść.\n";
        error = 1;
    }
									
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
}

function check_form_english() {
    var error = 0;
    var error_message = "Please correct the form data\n\n";
    var realname = document.f.realname.value;
    var email = document.f.email.value;
    var content = document.f.content.value;

    if (!realname) {
        error_message = error_message + "* Enter your first name and your surname.\n";
        error = 1;
    }
    /*
    if (!email) {
        error_message = error_message + "* Podaj E-mail odbiorcy.\n";
        error = 1;
    }
    */
    if (email) {
    
        if (email == "" || email.length < 6) {
    	    error_message = error_message + "* An E-mail address consist of a least 6 charakters.\n";
	}
	if (email.indexOf("@") == -1 || email.indexOf(".") == -1) {
            error_message = error_message + "* This email addres does not exist.\n";
	    error = 1;
	}	    		    
    }
    if (!content) {
        error_message = error_message + "* Enter a content.\n";
        error = 1;
    }
									
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
}