if (document.images) {
	logoOn = new Image();
	logoOn.src = "/images/logo.color.jpg";
	
	logoOff = new Image();
	logoOff.src = "/images/logo.gray.jpg";
}

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "On.src");
	}
}

function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "Off.src");
	}
}

// reg exp email check function
function isEmail(who) {
	var email=/^[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,4}$/i;
	return(email.test(who));
}

function CheckSRContact(form) {
	
	if (form.comment.value == "") {
		alert('Niste uneli tekst pitanja!');
	    form.comment.focus();
	    return false;
	}
	
	if (form.name.value == "") {
		alert('Niste uneli svoje ime i prezime!');
	    form.name.focus();
	    return false;
	}
	
	if ((form.email.value == "") || (isEmail(form.email.value) == false)) {
		alert('Uneli ste pogrešnu email adresu!');
	    form.email.focus();
	    return false;
	}
	
	return true;
}

function CheckENContact(form) {
	
	if (form.name.value == "") {
		alert('You must enter your name!');
	    form.name.focus();
	    return false;
	}
	
	if ((form.email.value == "") || (isEmail(form.email.value) == false)) {
		alert('You must enter valid email address!');
	    form.email.focus();
	    return false;
	}
	
	if (form.comment.value == "") {
		alert('Please, enter your question/comment...');
	    form.comment.focus();
	    return false;
	}
	
	return true;
}


function NextPicture() {
	if (document.images) {
		if (cImage < (images.length - 1)) {
			cImage++;
			pImage.src = images[cImage];
			document.images["cimg"].src = pImage.src;
		}
	}
}

function PreviousPicture() {
	if (document.images) {
		if (cImage > 1) {
			cImage--;
			pImage.src = images[cImage];
			document.images["cimg"].src = pImage.src;
		}
	}
}

function ShowPicture(iPicture) {
	if (document.images) {
		pImage.src = images[iPicture];
		document.images["cimg"].src = pImage.src;
	}
}