n = (document.layers)? 1:0; // netscape
ie = (document.all)? 1:0;   // internet explorer
if(n) 
        {
                var window_width = (screen.width - 5 );
                var window_height = (screen.height - 23 );
        }
if (ie) 
        {
                var window_width = ( screen.width - 10 );
                var window_height = ( screen.height - 55) ;
                var window_left = 0;
                var window_top = 0;
        }

function winmicro()
{ 
        var mywin=window.open('ct/ct.htm', 'SERRA', 'width='+window_width+', height='+window_height+', toolbar=no, status=yes, menubar=no, scrollbars=no')
mywin.moveTo(+window_left, +window_top)
} 


function OpenWin(URL,w,h,Nom) { 
var winW = (screen.width - w) / 2;
var winH = (screen.height - h) / 2;
var windowprops ="top=" + winH + ",left=" + winW + ",toolbar=no,location=no,status=no, menubar=no,scrollbars=no, resizable=no,width=" + w + ",height=" + h;
window.open(URL,Nom,windowprops);}