function center(id) { xwin = document.getElementById("xMsg"+id); var wleft = (document.body.clientWidth-xwin.style.width.replace("px",""))/2 < 0 ? 0 : (document.body.clientWidth-xwin.style.width.replace("px",""))/2; var wtop = (document.body.clientHeight-xwin.style.height.replace("px",""))/2 < 0 ? 0 : (document.body.clientHeight-xwin.style.height.replace("px",""))/2;; xwin.style.left = wleft; // xwin.style.top = wtop; xwin.style.top = 5; xwinbg = document.getElementById("xMsg"+id+"bg"); xwinbg.style.left = wleft; xwinbg.style.top = 5; }