function openWin(url)
{
//LeftPosition and TopPosition include the small amount of chrome and the header within the measurement.
//experiment with these numbers until your window is centered as you prefer
LeftPosition = (screen.width) ? (screen.width-690)/2 : 0; //update this to reflect your popupu window size
TopPosition = (screen.height) ? (screen.height-588)/2 : 0; //update this to reflect your popup window height
//this is the method that opens the window
//change the width and height values to fit your content
window.open(url, 'popup', 'width=408,height=507,top='+TopPosition+',left='+LeftPosition+',screenY='+TopPosition+',screenX='+LeftPosition+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no');
//in order to popup a window use the following HTML
//in the head of your document include the following:
//make sure the source points to this .js file
//
//Untitled
//
//
//in the body of your document replace yourpage.html with the name of your page
//testing
}