function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=250,height=250');");
}

function openAWindow(pageToLoad, winName, width, height, center) {
 	xposition=0; yposition=0;
    if ((parseInt(navigator.appVersion) >= 4 ) && (center)){
	    xposition = (screen.width - width) / 2;
        yposition = (screen.height - height) / 2;
    }
    args = "width=" + width + "," 
    + "height=" + height + "," 
    + "location=0," 
    + "menubar=0,"
    + "resizable=no,"
    + "scrollbars=no,"
    + "status=0," 
    + "titlebar=0,"
    + "toolbar=0,"
    + "hotkeys=0,"
    + "screenx=" + xposition + ","  //NN Only
    + "screeny=" + yposition + ","  //NN Only
    + "left=" + xposition + ","     //IE Only
    + "top=" + yposition;           //IE Only
    window.open( pageToLoad,winName,args );
}
function popNav() { 

   var url = "intropopup.html"; // nav url 
   var winW = 300; // window width 
   var winH = 300;   // window height 

   var winX = screen.availWidth - winW; 
   var navWin = window.open(url,'navWin','width='+winW+',height='+winH+',top=0,left='+winX+',resizable=no,scrollbars=no,location=no,statusbar=no,menubar=no'); 
   navWin.focus(); 

}