function popupWin(theURL,w,h,winTitle) {
var newWindow;
var properties = "toolbar=0,status=0,menubar=0,scrollbars=0,resizable=0,width="+w+",height="+h+",Left=" + (screen.width-w)/2 + ",Top=" + (screen.height-h)/2;
newWindow=window.open(theURL,'popupwin',properties);
newWindow.focus();
}