function winOpen(url, name, w, h) {

var H = screen.width/2 -(w/2);
var V = screen.height/2 -(h/2)-10;

window.open(url,name,"width="+w+",height="+h+",scrollbars=yes,resizable=1,menubar=0,toolbar=0,status=0,location=0,directories=0,left="+H+",top="+V+"").focus();
} 

function winOpen2(url, name, w, h) {

var H = 0;
var V = 0;

window.open(url,name,"width="+w+",height="+h+",scrollbars=yes,resizable=1,menubar=0,toolbar=0,status=0,location=0,directories=0,left="+H+",top="+V+"").focus();
}