function BrowserCheck() {
    var b=navigator.appName;
    if (b=="Netscape") this.b="ns";
    else if (b=="Microsoft Internet Explorer") this.b="ie";
    else this.b=b;
    this.version=navigator.appVersion;
    this.v=parseInt(this.version);
    this.ns=(this.b=="ns"&&this.v>=4);
    this.ns4=(this.b=="ns"&&this.v==4);
    this.ns5=(this.b=="ns"&&this.v==5);
    this.ie=(this.b=="ie"&&this.v>=4);
    this.ie4=(this.version.indexOf('MSIE 4')>0);
    this.ie5=(this.version.indexOf('MSIE 5')>0);
    this.min=(this.ns||this.ie);
}

is=new BrowserCheck();

function preload(imgObj,imgSrc) {
    if(document.images) {
	eval(imgObj+' = new Image()');
	eval(imgObj+'.src = "'+imgSrc+'"');
    }
}

function changeImage(layer,imgName,imgObj) {
    if(document.images) {
	if(document.layers&&layer!=null) eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
	else document.images[imgName].src=eval(imgObj+".src");
    }
}

function verinfdemo(ira,num) {
    open(ira+"/infdemo"+num+".html","demos","width=640,height=480,scrollbars,screenX=0,screenY=0,top=0,left=0");
}