Pb variable dans marquee

<SCRIPT LANGUAGE="JavaScript">

var marqueewidth=330 // longueur

var marqueeheight=20 // hauteur

var speed=6 // vitesse

var marqueecontents= "variable"; // variable au choix

if (document.all)

document.write('<marquee scrollAmount='+speed+' style="width:'+marqueewidth+'">'+marqueecontents+'</marquee>')

function regenerate2()
{

}

window.onload=regenerate2</SCRIPT> 

function recup4()
{
var i = "3";
var incid1;
var xhr_object = null;
xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
xhr_object.open("POST", 

'http://www.blabla.com', true);
xhr_object.onreadystatechange = function()
 {

  {
    if(xhr_object.readyState == 4)
    {


	  bas2 = xhr_object.responseText;
	  if (bas2)
	  {
 	  pos1 = bas2.indexOf("<span class");
	    if (pos1 != -1)
	    {
	      pos1 = bas2.indexOf("\">",pos1);
	      pos2 = bas2.indexOf("</span>",pos1);
 	      incid1 = bas2.substring(pos1+2,pos2);
	      document.Feuille.liste_incident.value=incid1;
      
            } 
	  }
   }

  }
}
xhr_object.send(null);

}