// window open bit
function popUp(url,w,h,win){
LeftPos = screen.width ? (screen.width-w)/2 : 0;
TopPos = screen.height ? (screen.height-h)/2 : 0;
MyWin = window.open(url,win,"scrollbars=0,resizable=1,top="+TopPos+",left="+LeftPos +"screenX=0,screenY=0," + ",width="+w+",height="+h);
}