function showUserNameExplanation() {
	if (document.all) {
		tempX = window.event.clientX + document.body.scrollLeft;
		tempY = window.event.clientY + document.body.scrollTop;
	} else {
		tempX = window.event.pageX
		tempY = window.event.pageY
	}  
	// Catch possible negative values in NS4
	if (tempX < 0) {
		tempX = 0;
	}
	if (tempY < 0) {
		tempY = 0;
	}
	
	var popup = document.getElementById('userNameExplanationHelp');
	popup.style.left = tempX - 190;
	popup.style.top = tempY + 15;
	popup.style.visibility = 'visible';
}
function showWhyRegister() {
	if (document.all) {
		tempX = window.event.clientX + document.body.scrollLeft;
		tempY = window.event.clientY + document.body.scrollTop;
	} else {
		tempX = window.event.pageX
		tempY = window.event.pageY
	}  
	// Catch possible negative values in NS4
	if (tempX < 0) {
		tempX = 0;
	}
	if (tempY < 0) {
		tempY = 0;
	}
	
	var popup = document.getElementById('whyRegisterHelp');
	popup.style.left = tempX + 120;
	popup.style.top = tempY - 65;
	popup.style.visibility = 'visible';
}
function hideUserNameExplanationHelp() {
	var popup = document.getElementById('userNameExplanationHelp');
	popup.style.visibility = 'hidden';
}
function hideWhyRegisterHelp() {
	var popup = document.getElementById('whyRegisterHelp');
	popup.style.visibility = 'hidden';
}