// sub navigation rollover script

function registerImage(imgName) {
	eval(imgName + "over = new Image()");
	eval(imgName + "over.src = \"/images/" + imgName + "_over.gif\"");
	eval(imgName + " = new Image()");
	eval(imgName + ".src = \"/images/" + imgName + ".gif\"");
}

function on(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + "over.src");
}

function off(imgID) {
	img = document.getElementById(imgID);
	img.src = eval(imgID + ".src");
}

//register top navigation rollovers
registerImage("scisubnav_antioxidants");
registerImage("scisubnav_radicals");
registerImage("scisubnav_science");
registerImage("subnav_articles");
registerImage("subnav_options");
registerImage("subnav_salesqa");
registerImage("subnav_science");
registerImage("subnav_scienceqa");
registerImage("subnav_worksbetter");
registerImage("btn_experts2");


// cetered pop-up script
function thePopper(url,ht,wd) {
var winl = (screen.width - wd)/2;
var wint = (screen.height - ht)/2;
exampleWin = window.open( url, "exwin", "status=0,toolbars=0,scrollbars=1,resizable=1,menubar=1,width="+wd+",height="+ht+",left="+winl+",top="+wint+"");
if(parseInt(navigator.appVersion) >= 4){exampleWin.window.focus();}
}