aWidth =screen.availWidth
aHeight = screen.availHeight

cenWidth  = ((screen.availWidth/2) - (790/2));
cenHeight = ((screen.availHeight/2) - (590/2));
 
function openWin(url) 
{
    aWindow=window.open(url,"docwnd","width=790,height=590,menubar=0,status=0,toolbar=0,scrollbars=yes,resizable=1,screenX=" + cenWidth + ",screenY=" + cenHeight + ",left=" + cenWidth + ",top=" + cenHeight);
}

function openWinSm(url) 
{
    aWindow=window.open(url,"docwnd","width=500,height=200,menubar=0,status=0,toolbar=0,scrollbars=yes,resizable=1,screenX=" + cenWidth + ",screenY=" + cenHeight + ",left=" + cenWidth + ",top=" + cenHeight);
}
function openWinMenu(url) 
{
    aWindow=window.open(url,"_blank","width=800,height=600,status=yes,toolbar=yes,menubar=yes,location=yes,scrollbars=yes,resizable=1,screenX=" + cenWidth + ",screenY=" + cenHeight + ",left=" + cenWidth + ",top=" + cenHeight);
}