if (document.images) {

	var imgPath = "images/"

	var home1 = new Image; home1.src = imgPath + "home-on.gif";
	var home0 = new Image; home0.src = imgPath + "home.gif";

	var about1 = new Image; about1.src = imgPath + "about-on.gif";
	var about0 = new Image; about0.src = imgPath + "about.gif";

	var products1 = new Image; products1.src = imgPath + "products-on.gif";
	var products0 = new Image; products0.src = imgPath + "products.gif";

	var services1 = new Image; services1.src = imgPath + "services-on.gif";
	var services0 = new Image; services0.src = imgPath + "services.gif";

	var contact1 = new Image; contact1.src = imgPath + "contact-on.gif";
	var contact0 = new Image; contact0.src = imgPath + "contact.gif";

	var rentals1 = new Image; rentals1.src = imgPath + "rentals-on.gif";
	var rentals0 = new Image; rentals0.src = imgPath + "rentals.gif";
}

function roll(imgName, onOff) {
	if (document.images) {
		var targetObj = eval(imgName+onOff);
		if (document.images[imgName] != null && targetObj != null) {
			document.images[imgName].src = targetObj.src;
		}
	}
}

function checkbox(name, hidden) {

	var box = document.getElementsByName(name);
	var boxAll = document.getElementsByName(hidden);
	
	if(boxAll.checked == true) {
		for(i = 0; i < box.length; i++) {
			box[i].checked = false;
		}
		boxAll.checked = false;
	}
	else  {
		for(i = 0; i < box.length; i++) {
			box[i].checked = true;
		}
		boxAll.checked = true;
	}

}

function openNewWin(page, width, height) {

  topPos = (screen.height - height) / 2;
  leftPos = (screen.width - width) / 2;

  window.open(page, '_blank', 'width=' + width + ', height=' + height + ', top=' + topPos +', left=' + leftPos);

}

function validate(myForm) {
	if (myForm.name.value == "") {
		alert("Please enter your name");
		return false;
	}
	if (myForm.desc.value == "") {
		alert("Please enter your comment");
		return false;
	}
	if (myForm.verf.value == "") {
		alert("Please enter verification code");
		return false;
	}
	return true;
}


function validate2(myForm) {
	if (myForm.name.value == "") {
		alert("Please enter your name");
		return false;
	}
	if (myForm.email.value == "") {
		alert("Please enter your email address");
		return false;
	}
	if (myForm.desc.value == "") {
		alert("Please enter your answer");
		return false;
	}
	return true;
}


function changeBg(id, newColour) {
	identity=document.getElementById(id);
	identity.style.backgroundColor = newColour;
}
function changeManyBg(idStart,idEnd,newColour){
	for (i = idStart; i <= idEnd; i++){
		changeBg(i,newColour);
	}
}