function navOver(imgTag)
{        
	var theImage = imgTag;	
	if(theImage.src.indexOf("_off.") != -1)	
	{
		theImage.src = theImage.src.replace("_off.","_on.");		
	}
	else	
	{
		theImage.src = theImage.src.replace("_on.","_off.");	
	}
}

function setColorActive(elem)
{
	elem.style.color = "#000000";
}
function setColorInactive(elem)
{
	elem.style.color = "#999999";
}
function hidePasswordTip()
{
	document.getElementById("passwordTip").style.textIndent = "-9999px";
}
function showPasswordTip()
{
	document.getElementById("passwordTip").style.textIndent = "0";
}
function resetSearchFields()
{
	document.getElementById("txtRegNum").value = "";
	document.getElementById("txtSurname").value = "";
	document.getElementById("txtInitial").value = "";
}