function PicSelect(picname){
document.getElementById('hidden').picname.value = picname;
NewWindow(picname,'680','540','no','no');
}

var win = null;
function NewWindow(picname,w,h,scroll,resize){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable='+resize+''

win = window.open('zoom.htm',picname,settings)

}