function rollover(image,source,folder,path,extension) {
    document.getElementById(image).src=path+'/'+folder+'/'+source+'_over.'+extension;
}
function rollout(image,source,folder,path,extension) {
    document.getElementById(image).src=path+'/'+folder+'/'+source+'.'+extension;
}

function rollover2(image,source,folder,path) {
    document.getElementById(image).src=path+'/'+'images/'+folder+'/'+source+'.gif';
}
function rollout2(image,source,folder,path) {
    document.getElementById(image).src=path+'/'+'images/'+folder+'/'+source+'.gif';
}

function preloadImages() {
    var d=document; 
    if(d.images) { 
        d.preload=new Array();
        var i;
        var a=preloadImages.arguments;
        for(i=0; i<a.length; i++) {
            d.preload[i]=new Image;
            d.preload[i].src=a[i];
        }
    }
}



function emailCheck (emailStr) {
    var emailPat=/^(.+)@(.+)$/
    //var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]\\/\\?\\!\\£\\$\\%\\&\\#\\~\\*\\'\\|\\`\\=\\¬\\¦\\}\\{\\+\\^"
    //var validChars="\[\\s" + specialChars + "\]"
    var validChars="[a-zA-Z0-9_-]"
    var quotedUser="(\"[^\"]*\")"
    var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
    var atom=validChars + '+'
    var word="(" + atom + "|" + quotedUser + ")"
    var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
    var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
    var matchArray=emailStr.match(emailPat)
    if (matchArray==null) {
        alert("Email address seems incorrect (check @ and .'s)")
        return false
    }
    var user=matchArray[1]
    var domain=matchArray[2]

    if (user.match(userPat)==null) {
            alert("Email address doesn't seem to be valid.")
            return false
    }

    var IPArray=domain.match(ipDomainPat)
    if (IPArray!=null) {
      for (var i=1;i<=4;i++) {
        if (IPArray[i]>255) {
            alert("Email address has an invalid destination IP.")
        return false
        }
        }
     return true
    }
    var domainArray=domain.match(domainPat)
    if (domainArray==null) {
        alert("Email address has an invalid domain name")
        return false
    }

    var atomPat=new RegExp(atom,"g")
    var domArr=domain.match(atomPat)
    var len=domArr.length
    if (domArr[domArr.length-1].length<2 || 
            domArr[domArr.length-1].length>4) {
        alert("Email address must end in a three-letter or four-letter domain, or two letter country.")
        return false
    }
    if (len<2) {
         var errStr="Email address doesn't have a hostname." ;
         alert(errStr);
        return false;
        }
    return true;
}

loginOpen = false ;
function openCloseLogIn(){
	if(document.getElementById){
		loginDivVar = document.getElementById("loginBG");
		loginButVar = document.getElementById("loginBut");
		closeLoginButVar = document.getElementById("closeLoginBut");
		if (loginOpen){
			loginDivVar.style.display = "none";
			loginButVar.style.display = "block";
			closeLoginButVar.style.display = "none";
			loginOpen = false ;
		} else {
			loginDivVar.style.display = "block";
			loginButVar.style.display = "none";
			closeLoginButVar.style.display = "block";
			loginOpen = true ;
		}
	}
}

function initLogin(){
	loginButVar = document.getElementById("loginBut");
	loginButVar.style.display = "block";
}


// newsletter

function newsletterFocus(textField){
	if(textField.value=="Email address"){
		textField.value = "" ;
		textField.className = "inputText inputBlack" ;
	}	
}

function newsletterSignUp(form){

	if (form.newsletteremail.value == "") {
		alert("Please enter your email address!")
		return false
	}
 
	if (!emailCheck (form.newsletteremail.value)) {
		form.newsletteremail.focus()
		form.newsletteremail.select()
		return false
	}

	return true

}

// credit application

function creditDateFocus(textField){
	if(textField.value=="dd/mm/yyyy"){
		textField.value = "" ;
		textField.className = "formTextShort" ;
	}	
}