//COMMON FUNCTIONS

function swapImage(num) {
	var imageSource = document.getElementById('topNavImage').src;	
	var imageDiv = document.getElementById('imageDiv');
	var newImageSource = "";
	
	if (num == 1) {
		newImageSource = imageSource.substring(0,imageSource.lastIndexOf("/")) + "/navNoneSelected.gif";				
		imageDiv.innerHTML = "<img id='topNavImage' src=" + newImageSource + " USEMAP='#topNav' border='0' /><br>";							
	}
	if (num == 2) {
		newImageSource = imageSource.substring(0,imageSource.lastIndexOf("/")) + "/navHowSelected.gif";				
		imageDiv.innerHTML = "<img id='topNavImage' src=" + newImageSource + " USEMAP='#topNav' border='0' /><br>";		
	}
	if (num == 3) {
		newImageSource = imageSource.substring(0,imageSource.lastIndexOf("/")) + "/navUnderstandngSelected.gif";				
		imageDiv.innerHTML = "<img id='topNavImage' src=" + newImageSource + " USEMAP='#topNav' border='0' /><br>";		
	}
	if (num == 4) {
		newImageSource = imageSource.substring(0,imageSource.lastIndexOf("/")) + "/navFAQsSelected.gif";				
		imageDiv.innerHTML = "<img id='topNavImage' src=" + newImageSource + " USEMAP='#topNav' border='0' /><br>";		
	}
}