var liste = new Object(); 
liste["schluessel"] = "wert"; 
if(liste.hasOwnProperty("schluessel")) 
    $.writeln(liste["schluessel"]); 

    /*int*/Array.prototype.addElementIfNotExist=function(/*object*/o) 
    { 
        var p = this.indexOf(o); 
        if (p<0) 
        { 
            this.push(o); 
            return this.length; 
        } 
        return p; 
    } 
    /*int*/ Array.prototype.indexOf=function(/*any*/value, /*string\int*/field, /*int*/ startPosition) 
    { 
        var l = this.length; 
        if ( startPosition == null) startPosition = 0; 
        if ( startPosition < 0) startPosition = l+startPosition; 
        if ( startPosition < 0) startPosition = 0;   
        if (field == null) 
        { 
            for (var i = startPosition; i<l;i++) 
                if (this[i]==value) return i; 
        } 
        else 
        { 
            for (var i = startPosition; i<l;i++) 
                if (this[i][field]==value) return i; 
        } 
        return -1; 
    }