function openNewWindow() {
windowhandle = window.open('service_level_popup.php','service','width=450,height=450,scrollbars');
}

function openDataWindow(pagename) {
h = 700;
w = 740;

if (screen.availheight < 700) {
h = screen.availheight - 30;
}
windowhandle = window.open(pagename+'.html','large','width='+w+',height='+h+',scrollbars,top=0,left=0');
}

function openbkg(num) {
windowhandle = window.open('show-background.php?b='+num,'large','width=640,height=480,top=0,left=0');
}

function opensample() {
h = 610;
w = 740;

if (screen.availheight < 610) {
h = screen.availheight - 30;
}


windowhandle = window.open('show-sample.php','large','width='+w+',height='+h+',scrollbars,top=0,left=0');
}