//general stuff

function MM_swapImgRestore() {
  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() {
  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) {
  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() {
  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 MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function MM_jumpMenuGo(selName,targ,restore){ //v3.0
  var selObj = MM_findObj(selName); if (selObj) MM_jumpMenu(targ,selObj,restore);
}

function eFix(){
  for (a in document.links)
	  document.links[a].onfocus = document.links[a].blur;
}

if (document.all) {
  document.onmousedown = eFix;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

// date stuff

var dtCh = "/";
var minYear = 1900;
var maxYear = 2100;

function isInteger(s) {
	var i;
	for (i = 0; i < s.length; i++) {   
		var c = s.charAt(i);
		if (((c < "0") || (c > "9"))) return false;
	}
	return true;
}

function stripCharsInBag(s, bag) {
	var i;
	var returnString = "";
	for (i = 0; i < s.length; i++) {   
		var c = s.charAt(i);
		if (bag.indexOf(c) == -1) returnString += c;
	}
	return returnString;
}

function daysInFebruary(year) {
	return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31;
		if (i==4 || i==6 || i==9 || i==11) { this[i] = 30; }
		if (i==2) { this[i] = 29; }
	} 
	return this;
}

function isDate(dtStr) {

	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strDay=dtStr.substring(0,pos1);
	var strMonth=dtStr.substring(pos1+1,pos2);
	var strYear=dtStr.substring(pos2+1);

	strYr=strYear;

	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1);
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1);
	
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1);
	}

	month=parseInt(strMonth);
	day=parseInt(strDay);
	year=parseInt(strYr);

	if (pos1==-1 || pos2==-1){
		return false;
	}
	
	if (strMonth.length<1 || month<1 || month>12) {
		return false;
	}
	
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]) {
		return false;
	}

	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear) {
		return false;
	}
	
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false;
	}
	
	return true;
}


// admin stuff

function deleteArticle(id) {
	if(confirm("Are you sure you wish to delete this article?")) {
		document.location.href="delete.php?id=" + id;
	}
}

function deleteEvent(id) {
	if(confirm("Are you sure you wish to delete this event?")) {
		document.location.href="delete.php?eventId=" + id;
	}
}

function deleteDocument(section, id) {
	if(confirm("Are you sure you wish to delete this document?")) {
		document.location.href="delete.php?section=" + section + "&id=" + id;
	}
}

function deleteAccommodation(section, id) {
	if(confirm("Are you sure you wish to delete this entry?")) {
		document.location.href="delete.php?section=" + section + "&id=" + id;
	}
}

function checkFormAddNews() {

	var strDate;

	if (document.frmAdd.headline.value==""){
		alert("Please enter a headline");
		document.frmAdd.headline.focus();
		return false;
	}

	strDate = document.frmAdd.startday.value + "/" + document.frmAdd.startmonth.value  + "/" + document.frmAdd.startyear.value;

	if (!isDate(strDate)){
		alert("Please enter a valid start date");
		document.frmAdd.startday.focus();
		return false;
	}
	
	if(document.frmAdd.expiryday.value!="" || document.frmAdd.expirymonth.value!="" || document.frmAdd.expiryyear.value!="") {
		
		strDate = document.frmAdd.expiryday.value + "/" + document.frmAdd.expirymonth.value  + "/" + document.frmAdd.expiryyear.value;
	
		if (!isDate(strDate)){
			alert("Please enter a valid expiry date");
			document.frmAdd.expiryday.focus();
			return false;
		}
		
	}
	
	return true;	

}

function checkFormAddDocument() {

	if (document.frmUpload.title.value==""){
		alert("Please enter the document title");
		document.frmUpload.title.focus();
		return false;
	}
	
	if (document.frmUpload.userfile.value==""){
		alert("Please select the document to upload");
		document.frmUpload.userfile.focus();
		return false;
	}

	if (document.frmUpload.userfile.value==""){
		alert("Please select the document to upload");
		document.frmUpload.userfile.focus();
		return false;
	}

	var strDate = document.frmUpload.day.value + "/" + document.frmUpload.month.value  + "/" + document.frmUpload.year.value;
	
	if (!isDate(strDate)){
		alert("Please enter a valid document date");
		document.frmUpload.day.focus();
		return false;
	}
	
	return true;

}

function checkFormAddAccommodation() {

	if (document.frmAdd.name.value==""){
		alert("Please enter a name");
		document.frmAdd.name.focus();
		return false;
	}

	if (document.frmAdd.town.value==""){
		alert("Please enter a town");
		document.frmAdd.town.focus();
		return false;
	}

	if (document.frmAdd.county.value==""){
		alert("Please enter a county");
		document.frmAdd.county.focus();
		return false;
	}

	if (document.frmAdd.phone.value==""){
		alert("Please enter a phone number");
		document.frmAdd.phone.focus();
		return false;
	}	

	if (document.frmAdd.details.value==""){
		alert("Please enter some details");
		document.frmAdd.details.focus();
		return false;
	}
			
	return true;
	
}

function checkFormPassword() {

	if(document.frmChange.password1.value=="") {
		alert("You must enter a new password");
		document.frmChange.password1.focus();
		return false;
	}

	if(document.frmChange.password1.value!=document.frmChange.password2.value) {
		alert("The two passwords do not match, please try again.");
		document.frmChange.password1.value="";
		document.frmChange.password2.value="";
		document.frmChange.password1.focus();
		return false;
	}
	
	return true;
	
}