if (document.images) {
	tpcthird0 = new Image
	tpcthird = new Image
	
	tpcthird0.src = "images/tpcthird0.jpg"
	tpcthird.src = "images/tpcthird.jpg"
	

	tpcover = new Image
	tpc     = new Image
	

	tpcover.src = "images/tpcover.jpg"
	tpc.src     = "images/tpc.jpg" 
	}

function chgImg(imgField,newImg) {
	if (document.images) {
	document[imgField].src = eval(newImg + ".src")

	}
}