var imageviewer;
var viewingimage;

maxWidth=790;
maxHeight=500;
LeftPosition = (screen.width) ? (screen.width-maxWidth)/2 : 0;
TopPosition = (screen.height) ? (screen.height-maxHeight)/2 : 0;

function open_window(url) {
	mywin = window.open(url,"_blank",'left='+LeftPosition+',top='+TopPosition+',toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+maxWidth+',height='+maxHeight);
}
function open_URL(url) {
	mywin = window.open(url,"_blank");
}

function open_Image(imgsrc){
	//window.alert("showing : "+imgsrc);
	if (imageviewer && !imageviewer.closed) imageviewer.close		
	imageviewer = window.open('blowupimage.html',"ImageViewer",'left='+LeftPosition+',top='+TopPosition+',toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+maxWidth+',height='+maxHeight);
	viewingimage = imgsrc;
}
function getImage(){ return viewingimage;}

Image1 = new Image(17,89)
Image1.src = "../purchasingmedia/nav2-cur.jpg"
Image2 = new Image(17,89)
Image2.src = "../purchasingmedia/nav2-cur-over.jpg"
Image3 = new Image(17,88)
Image3.src = "../purchasingmedia/nav4-sub.jpg"
Image4 = new Image(17,88)
Image4.src = "../purchasingmedia/nav4-sub-over.jpg"
Image5 = new Image(17,93)
Image5.src = "../purchasingmedia/nav6-ar.jpg"
Image6 = new Image(17,93)
Image6.src = "../purchasingmedia/nav6-ar-over.jpg"
Image7 = new Image(17,48)
Image7.src = "../purchasingmedia/nav8-ab.jpg"
Image8 = new Image(17,48)
Image8.src = "../purchasingmedia/nav8-ab-over.jpg"
Image9 = new Image(17,65)
Image9.src = "../purchasingmedia/nav10-me.jpg"
Image10 = new Image(17,65)
Image10.src = "../purchasingmedia/nav10-me-over.jpg"
Image11 = new Image(17,58)
Image11.src = "../purchasingmedia/nav12-co.jpg"
Image12 = new Image(17,58)
Image12.src = "../purchasingmedia/nav12-co-over.jpg"

function light_current() {document.navcurrent.src = Image2.src;}
function dim_current() {document.navcurrent.src = Image1.src;}
function light_subscript() {document.navsubscript.src = Image4.src;}
function dim_subscript() {document.navsubscript.src = Image3.src;}
function light_archive() {document.navarchive.src = Image6.src;}
function dim_archive() {document.navarchive.src = Image5.src;}
function light_about() {document.navabout.src = Image8.src;}
function dim_about() {document.navabout.src = Image7.src;}
function light_media() {document.navmedia.src = Image10.src;}
function dim_media() {document.navmedia.src = Image9.src;}
function light_contact() {document.navcontact.src = Image12.src;}
function dim_contact() {document.navcontact.src = Image11.src;}