function winopen(url, name, w, h,imgid)
{
w+=32;
h+=96;
l=(screen.availWidth / 2) - (w / 2);
t=(screen.availHeight / 2) - (h / 2);
var win = window.open(url,name, 'width=' + w + ', left = ' + l + ', top =' + t + ', height=' + h + ',location=no, menubar=no, status=no, titlebar=no, toolbar=no, scrollbars=yes, resizable=yes');

win.focus();
}

function mywinopen(url, name, w, h)
{
w+=800;
h+=400;
l=1;
t=(screen.availHeight / 2) - (h / 2);
var mywin = window.open(url,name, 'width=' + w + ', left = ' + l + ', top =' + t + ', height=' + h + ',location=no, menubar=no, status=no, titlebar=no, toolbar=no, scrollbars=yes, resizable=yes');

mywin.focus();
}