if (document.images) { 
            img1on = new Image();      
            img1on.src = "images/pass_on.gif"; 
            
            img1off = new Image(); 
            img1off.src = "images/pass.gif"; 
            }

function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}

// window launcher

function openNewWindow(pageref, sWindowName)
{
	newwinref = window.open("",sWindowName,"left=0,screenX=0,top=0,screenY=0,width=790,height=530,resizable=1,scrollbars=1,status=1");
	newwinref.location=pageref;
	document.close();
}