function clickButton(e, buttonid)

          {

               var bt = document.getElementById(buttonid);

               if (typeof bt == 'object')

               {

                    if(navigator.appName.indexOf("Netscape")>(-1))

                    {

                         if (e.keyCode == 13)

                         {

                              bt.click();

                              return false;

                         }

                    }

                    if (navigator.appName.indexOf("Microsoft Internet Explorer")>(-1))

                    {

                         if (event.keyCode == 13)

                         {

                              bt.click();

                              return false;

                         }

                   }

              }

          }

        function MM_preloadImages() { //v3.0

          var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();

            var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)

            if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}

        }

 

        function MM_swapImgRestore() { //v3.0

          var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;

        }

 

        function MM_findObj(n, d) { //v4.01

          var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {

            d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}

          if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];

          for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);

          if(!x && d.getElementById) x=d.getElementById(n); return x;

        }

 

        function MM_swapImage() { //v3.0

          var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)

           if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}

        }

        function MM_openBrWindow(theURL,winName,features) { //v2.0

          window.open(theURL,winName,features);

        }
		
		
		    function displayAnswer(textId) {

    if (eval("document.getElementById('" + textId + "_answer').style.display == ''")) {

                eval("document.getElementById('" + textId + "_answer').style.display = 'none'");

        } else {

                eval("document.getElementById('" + textId + "_answer').style.display = ''");

        }

    }