// functions.js - define javascript functions used throughout the application

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) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); 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 changeLanguage(lang, filename) {
	var url=window.location.href;
	var lastchar=url.charAt(url.length-1);
	if (lastchar=="/") {
		url=url+"index.php?";
	}
	url=url.replace("header.php","index.php"); // fix safari issue
	url=url.replace("lang=en","");
	url=url.replace("lang=fr","");	
	url=url+"&lang="+lang;
	url=url.replace(".php&",".php?");	
	url=url.replace("&&","&");
	url=url.replace("?&","?");	
	parent.location=url;	
}

function validateEmail(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   return false
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	}
	 if (str.indexOf(at,(lat+1))!=-1){
		return false
	 }
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	 }
	 if (str.indexOf(dot,(lat+2))==-1){
		return false
	 }
	 if (str.indexOf(" ")!=-1){
		return false
	 }
	 return true					
}

function validateFeedbackForm() {
	var success=true;
	document.getElementById("yourname_error").style.display="none";
	document.getElementById("youremail_error").style.display="none";
	document.getElementById("message_error").style.display="none";	
	if (document.feedbackform.yourname.value=="") {
		document.getElementById("yourname_error").style.display="block";
		success=false;
	}
	if (document.feedbackform.youremail.value=="" || !validateEmail(document.feedbackform.youremail.value)) {
		document.getElementById("youremail_error").style.display="block";
		success=false;
	}	
	if (document.feedbackform.message.value=="") {
		document.getElementById("message_error").style.display="block";
		success=false;
	}	
	return success;
}

function validatePostcardSend() {
	var success=true;
	document.getElementById("yourname_error").style.display="none";
	document.getElementById("youremail_error").style.display="none";
	document.getElementById("friend1_error").style.display="none";	
	document.getElementById("friend2_error").style.display="none";	
	document.getElementById("friend3_error").style.display="none";	
	document.getElementById("friend4_error").style.display="none";	
	document.getElementById("friend5_error").style.display="none";		
	document.getElementById("message_error").style.display="none";	
	if (document.sendform.yourname.value=="") {
		document.getElementById("yourname_error").style.display="block";
		success=false;
	}
	if (document.sendform.youremail.value=="" || !validateEmail(document.sendform.youremail.value)) {
		document.getElementById("youremail_error").style.display="block";
		success=false;
	}
	if (document.sendform.friend1.value=="" || !validateEmail(document.sendform.friend1.value)) {
		document.getElementById("friend1_error").style.display="block";
		success=false;
	}	
	if (document.sendform.friend2.value!="" && !validateEmail(document.sendform.friend2.value)) {
		document.getElementById("friend2_error").style.display="block";
		success=false;
	}		
	if (document.sendform.friend3.value!="" && !validateEmail(document.sendform.friend3.value)) {
		document.getElementById("friend3_error").style.display="block";
		success=false;
	}	
	if (document.sendform.friend4.value!="" && !validateEmail(document.sendform.friend4.value)) {
		document.getElementById("friend4_error").style.display="block";
		success=false;
	}	
	if (document.sendform.friend5.value!="" && !validateEmail(document.sendform.friend5.value)) {
		document.getElementById("friend5_error").style.display="block";
		success=false;
	}		
	if (document.sendform.message.value=="") {
		document.getElementById("message_error").style.display="block";
		success=false;
	}	
	if (document.sendform.message.value.length>225) {
		document.getElementById("message_error2").style.display="block";
		success=false;
	}		
	return success;
}