///////////////////////////////////////////////////////////////////////////////////////////////
//
//  JavaScript - Utils
//
///////////////////////////////////////////////////////////////////////////////////////////////

//
//  Browsercheck
//
function Is()
{
    var agent = navigator.userAgent.toLowerCase();

    this.major = parseInt(navigator.appVersion);
    this.minor = parseFloat(navigator.appVersion);

    // netscape
    this.ns    = ((agent.indexOf("mozilla") != -1) && ((agent.indexOf("spoofer")==-1) && (agent.indexOf('compatible') == -1)));
    this.ns2   = (this.ns && (this.major == 3));
    this.ns3   = (this.ns && (this.major == 3));
    this.ns4b  = (this.ns && (this.minor < 4.04));
    this.ns4   = (this.ns && (this.major >= 4));

    // internet explorer
    this.ie    = (agent.indexOf("msie") != -1);
    this.ie3   = (this.ie && (this.major == 2));
    this.ie4   = (this.ie && (this.major >= 4));

    // opera
    this.op3   = (agent.indexOf("opera") != -1);

    // platform
    this.win   = (agent.indexOf("win") != -1);
    this.mac   = (agent.indexOf("mac") != -1);
    this.unix  = (agent.indexOf("x11") != -1);
}

var is = new Is();

//---------------------------------------------------------------------------------------------
//
//  Search object in document.
//
//---------------------------------------------------------------------------------------------
function FindObject( id, doc )
{
    var obj = null;

    if( !doc ) doc = document;

    //  W3 conform
    if( document.GetElementById )
    {
        obj = doc.GetElementById( id );
    }

    //  Internet Explorer
    else if( document.all )
    {
        obj = doc.all[id];
    }

    //  Netscape
    else if( document.layers )
    {
        obj = doc.layers[id];

        //  Search in images.
        for( var i = 0; i < doc.images.length && !obj; i++ )
        {
            if( doc.images[i].id && doc.images[i].id == id )  // Has id ?
            {
                obj = doc.images[i];
            }
            else if( doc.images[i].name && doc.images[i].name == id ) // Has name ?
            {
                obj = doc.images[i];
            }
        }

        //  Search in forms.
        //  comming!

        //  Search in sub-layers.
        for( var i = 0; i < doc.layers.length && !obj; i++ )
        {
            obj = FindObject( id, doc.layers[i].document );
        }
    }

    return obj;
}

function PreloadImages( Images )
{
   if( !document.images )
       return false;

   for( i = 0; i < Images.length; i++ )
   {
        var image = new Image();
        image.src = Images[i];
   }
}