var ns = (navigator.appName == 'Netscape');
var gen3 = (parseInt(navigator.appVersion) >= 3 && parseInt(navigator.appVersion) < 4);
var ns4 = (ns && parseInt(navigator.appVersion) >= 4 && parseInt(navigator.appVersion) < 5);
var ns5 = (ns && parseInt(navigator.appVersion) >= 5 && parseInt(navigator.appVersion) < 6);
var ie = (navigator.appName == 'Microsoft Internet Explorer');
var ie3 = (ie && navigator.appVersion < 4);
var ie4 = (ie && parseInt(navigator.appVersion) >= 4);
var docom = (document.getElementById);
var win2k = (navigator.userAgent.indexOf('Windows NT 5.0') != -1);
var ie4mac = (ie && !docom && navigator.userAgent.indexOf('Macintosh') != -1);
var ie5mac = (navigator.appVersion.indexOf('MSIE 5.0; Macintosh')!=-1);
var dhtmlBrowser = (ie4 || ns4 || docom);
var win31 = (navigator.appVersion.indexOf("Win16") != -1)
jscape = ns4;
var ns6=ns5

  function initLayout(layer_id){
        //Works for Netscape 6 or IE
        //Set Visibility to true and sets x position of the layer

        //Does not work for Netscape 4 yet!

        window_width = (ns||ns5)?window.innerWidth:window.document.body.clientWidth;
        xpos = ((window_width-740)/2)+520;
		if (xpos<520) xpos=520;
        if (xpos<0) xpos=0;
        if(ns5){
                document.getElementById(layer_id).style.left = xpos;
                document.getElementById(layer_id).style.top = document.getElementById(layer_id).style.top+6;
        }
        else if(!ns){
                eval('document.all.'+layer_id+'.style.left = '+xpos);

        }

  }