function displayElement ( id ) {
        if (document.getElementById(id).style.display != "none") {
                document.getElementById(id).style.display="none";
                setCookie("medisign",id+"=none",30);
                id=id.split('_');
                id=id[1];
                id="teaserHead_"+id;
                prt='';
                if(this.location.port!='') {
                prt=':'+this.location.port;
                }
                document.getElementById(id).style.backgroundImage='url(' + this.location.protocol + '//' + this.location.hostname + prt + '/resource/images/button_teaser_open.gif)';
        } else {
                document.getElementById(id).style.display="block";
                setCookie("medisign",id+"=block",30);
                id=id.split('_');
                id=id[1];
                id="teaserHead_"+id;
                prt='';
                if(this.location.port!='') {
                prt=':'+this.location.port;
                }
                document.getElementById(id).style.backgroundImage='url(' + this.location.protocol + '//' + this.location.hostname + prt + '/resource/images/button_teaser_close.gif)';
        }
}