{
	know0=new Image();
	know0.src="../images/nav-know-off.jpg";
	know1=new Image();
	know1.src="../images/nav-know-on.jpg";  
	
	eat0=new Image();
	eat0.src="../images/nav-eat-off.jpg";
	eat1=new Image();
	eat1.src="../images/nav-eat-on.jpg";
	
	learn0=new Image();
	learn0.src="../images/nav-learn-off.jpg";
	learn1=new Image();
	learn1.src="../images/nav-learn-on.jpg";
	
	live0=new Image();
	live0.src="../images/nav-live-off.jpg";
	live1=new Image();
	live1.src="../images/nav-live-on.jpg";
	
	pro0=new Image();
	pro0.src="../images/nav-pro-off.jpg";
	pro1=new Image();
	pro1.src="../images/nav-pro-on.jpg";
	
	edu0=new Image();
	edu0.src="../images/nav-edu-off.jpg";
	edu1=new Image();
	edu1.src="../images/nav-edu-on.jpg";
	
	about0=new Image();
	about0.src="../images/nav-about-off.jpg";
	about1=new Image();
	about1.src="../images/nav-about-on.jpg";
}

// main nav functions

function navOn(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + '1.src');
	}
}

function navOff(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + '0.src');
	}
}


{
	symposium0=new Image();
	symposium0.src="../images/symposium-off.gif";
	symposium1=new Image();
	symposium1.src="../images/symposium-on.gif"; 
	
	resourcesp0=new Image();
	resourcesp0.src="../images/resourcesp-off.gif";
	resourcesp1=new Image();
	resourcesp1.src="../images/resourcesp-on.gif";
	
	sym20070=new Image();
	sym20070.src="../images/sym2007-off.gif";
	sym20071=new Image();
	sym20071.src="../images/sym2007-on.gif";
	
	phighlights0=new Image();
	phighlights0.src="../images/phighlights-off.gif";
	phighlights1=new Image();
	phighlights1.src="../images/phighlights-on.gif";
	
	presentations0=new Image();
	presentations0.src="../images/presentations-off.gif";
	presentations1=new Image();
	presentations1.src="../images/presentations-on.gif";
}

// left nav functions

function lnavOn(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + '1.src');
	}
}

function lnavOff(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + '0.src');
	}
}


// gda tool popup function

function gdaPopup() {
	window.open('../gda-tool/GDA3.html','GDA','width=970,height=790,resizable=yes,toolbar=no,scrollbars=yes');
}