function displayPage(pageName) {
    var wpage = "";
	var wWidth = 0;
	var wHeight = 0;
    
    if (pageName == "Russianreview") {
       wpage = "territories-russian-review.html";
       wWidth = 500;
       wHeight = 300;
    }   
    
    cleft = (screen.availWidth - wWidth) / 2;
    ctop = (screen.availHeight - wHeight) / 2;
    windowParms = "toolbar=0,location=0,status=0,menubar=0,scrollbars=1,replace=false,width=" + wWidth + ",height=" + wHeight + ",top=" + ctop + ",left=" + cleft;
    childWin = window.open(wpage,null,windowParms);
}