function displayPage(pageName) {
    var wpage = "";
    var wWidth = 0;
    var wHeight = 0;
    var windowParms = "";
    
    windowParms = "toolbar=0,location=0,status=0,menubar=0,scrollbars=0,replace=false";
    
    if (pageName == "TerritoriesNetherlands") {
       wpage = "territories-netherlands.html";
       wWidth = 780;
       wHeight = 590;
    } 
    if (pageName == "TerritoriesHungary") {
       wpage = "territories-hungary.html";
       wWidth = 700;
       wHeight = 550;
    }   
    if (pageName == "TerritoriesDTCContest") {
       wpage = "territories-DTC-contest.html";
       wWidth = 454;
       wHeight = 150;
    }   
    if (pageName == "TerritoriesAd") {
       wpage = "territories-ad.html";
       wWidth = 650;
       wHeight = 464;
    }       
    if (pageName == "RussianReview") {
       wpage = "territories-russian-review.html";
       wWidth = 500;
       wHeight = 300;
       /* turns on scrollbar for this window */
	   windowParms = "toolbar=0,location=0,status=0,menubar=0,scrollbars=1,replace=false";
    }   

    cleft = (screen.availWidth - wWidth) / 2;
    ctop = (screen.availHeight - wHeight) / 2; 
    windowParms = windowParms + ",width=" + wWidth + ",height=" + wHeight + ",top=" + ctop + ",left=" + cleft;
    childWin = window.open(wpage,null,windowParms);
}