function image_preload () {
	image1 = new Image();
	image1.src = "../common/img/header/barcode_on.gif";
	image2 = new Image();
	image2.src = "../common/img/header/displacement_on.gif";
	image3 = new Image();
	image3.src = "../common/img/header/marking_on.gif";
	image4 = new Image();
	image4.src = "../common/img/header/microscope_on.gif";
	image5 = new Image();
	image5.src = "../common/img/header/photoelectric_on.gif";
	image6 = new Image();
	image6.src = "../common/img/header/plc_on.gif";
	image7 = new Image();
	image7.src = "../common/img/header/pressure_on.gif";
	image8 = new Image();
	image8.src = "../common/img/header/worldsupport_on.gif";
	image9 = new Image();
	image9.src = "../common/img/header/recorders_on.gif";
	image10 = new Image();
	image10.src = "../common/img/header/servo_on.gif";
	image11 = new Image();
	image11.src = "../common/img/header/static_on.gif";
	image12 = new Image();
	image12.src = "../common/img/header/vision_on.gif";
}

function show_def (defname) {
	document.getElementById(defname).style.display = "block";
}

function hide_def (defname) {
	document.getElementById(defname).style.display = "none";
}

function roll_in (cell, image) {
	document.getElementById(image).src = "../common/img/header/" + image + "_on.gif";
	cell.style.color = "#66CC00";
	cell.style.background = "white";
}

function roll_out (cell, image) {
	document.getElementById(image).src = "../common/img/header/" + image + "_off.gif";
	cell.style.color = "black";
	cell.style.background = "#FFFFCC";
}

function open_glossary () {
	newwindow=window.open('','glossary','height=600,width=600,resizable=yes,scrollbars=yes,toolbar=no,location=no,menubar=no,status=yes');
	if (window.focus) {newwindow.focus()}
}