Just change the openpopup() function with this one:
Code:
function openpopup()
{
x=450
y=140
l=(screen.availWidth/2)-(x/2)
t=(screen.availHeight/2)-(y/2)
var popurl="eraser.htm"
features="width="+x+",height="+y+",status=no,toolbar=no,menubar=no,resizable=no,left="+l+",top="+t
winpops=window.open(popurl,"",features)
}
You can change to "status=yes", "toolbar=yes" etc