function sampDisplay(varNum){
	var varElement;
	var navElement;
	var navElement2;
	
	//Hide all sample Images
	for (var i=1; i<15; i++){
		varElement = document.getElementById('samp' + i);
		if (varElement != undefined) {
		    varElement.style.display= "none";
		}
	}
	
	//display the selected item
	selElement = 'samp' + varNum
	document.getElementById(selElement).style.display= "block";
	
	
	//turn off all nav itmes
	for (var i=1; i<15; i++){
		navElement = document.getElementById('nav' + i);
		if (navElement != undefined) {
    		navElement.style.opacity= "0.5";
	    	navElement.style.filter= "alpha(opacity=50)";
		    navElement.style.MozOpacity= "0.5";
		}
	}
	
	//turn on correct nav item
	navElement2 = document.getElementById('nav' + varNum);
	navElement2.style.opacity= "1.0";
	navElement2.style.filter= "alpha(opacity=100)";
	navElement2.style.MozOpacity= "1.0";
}