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 preloadMenu(){
	MM_preloadImages('images/button-home-over.jpg', 
					 'images/button-contact-over.jpg', 
					 'images/button-biography-over.jpg', 
					 'images/button-books-over.jpg',
					 'images/button-reviews-over.jpg',
					 'images/button-news-over.jpg',
					 'images/button-other-authors-over.jpg',
					 'images/button-links-over.jpg'
					 );
}
preloadMenu();
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// Check email a friend form
/////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkEmailAFriend(){
	var x = document.TellAFriend.Email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)){
		// valid email address
		if(document.TellAFriend.Name.value =='' || document.TellAFriend.Name.value.length <3 || document.TellAFriend.Name.value =='Your Name'){
			alert('Please enter your name');
			return false;
		}else {
			return true;
		}

	} else {	
		alert('Please enter a valid email address');
		return false;
	}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// Check email a friend form
/////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkContactForm(){
		var x = document.contactEveMakis.msgEmail.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)){
		// valid email address
		if(document.contactEveMakis.msgName.value =='' || document.contactEveMakis.msgName.value.length <3 || document.contactEveMakis.msgName.value =='Your Name'){
			alert('Please enter your name');
			return false;
		} else if(document.contactEveMakis.msgSubject.value =='' || document.contactEveMakis.msgSubject.value.length <3 ){
			alert('Please enter a subject');
			return false;
		} else if(document.contactEveMakis.message.value =='' || document.contactEveMakis.message.value.length <3 ){
			alert('Please enter a message');
			return false;
		} else {
			return true;
		}

	} else {	
		alert('Please enter a valid email address');
		return false;
	}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// Check add comment
/////////////////////////////////////////////////////////////////////////////////////////////////////////
function checkAddComment(){
		if(document.AddAcomment.commentName.value =='' || document.AddAcomment.commentName.value.length <3 || document.AddAcomment.commentName.value =='Your name'){
			alert('Please enter your name');
			return false;
		}else if(document.AddAcomment.comment.value =='' || document.AddAcomment.comment.value.length <3 || document.AddAcomment.comment.value =='Write your comments here'){
			alert('Please enter a comment');
			return false;
		} else {
			return true;
		}
		


}