Code javascript pour ouvrir un lien en pleine page

<script language="javascript">
imgPath = new Array;
SiClickGoTo = new Array;
version = navigator.appVersion.substring(0,1);
if (version >= 3)
 {
 i0 = new Image;
 i0.src = 'http://55.46.5.167/Actualite/image/caroussel_1.png';
 SiClickGoTo[0] = 
 "http://55.46.5.167/communication/mini_site_COM/portail_COM.html";
 imgPath[0] = i0.src;
 i1 = new Image;
 i1.src = 'http://55.46.5.167/Actualite/image/caroussel_2.png';
 SiClickGoTo[1] = "http://55.46.5.167/communication/mini_site_COM/une.html";
 imgPath[1] = i1.src;
 i2 = new Image;
 i2.src = 'http://55.46.5.167/Actualite/image/caroussel_3.png';
 SiClickGoTo[2] = "http://55.46.5.167/communication/mini_site_COM/zoom.html";
 imgPath[2] = i2.src;
 }
 i3 = new Image;
 i3.src = 'http://55.46.5.167/Actualite/image/caroussel_4.png';
 SiClickGoTo[3] = "http://55.46.5.167/communication/mini_site_COM/fichiers/leaflet_loi_touraine.pdf";
 imgPath[3] = i3.src;
a = 0;
function StartAnim()
 {
 if (version >= 3)
  {
 document.write('<a href="#" onclick="ImgDest();return(false)"><img src="http://55.46.5.167/Actualite/image/caroussel_1.png" border="0" alt="Menu" name="defil" /></a>');
  defilimg()
  }
 else
  {  
  document.write('<a href="http://55.46.5.167/communication/mini_site_COM/portail_COM.html"onclick="window.open(this.href);"><img src="http://55.46.5.167/Actualite/image/caroussel_1.png" border="0" /></a>')
  } 
  }
 function ImgDest()
{
window.open(SiClickGoTo[a-1]);
 }
function defilimg()
 {
 if (a == 4)
  {
  a = 0;
  }
 if (version >= 3)
  {
  document.defil.src = imgPath[a];
  tempo3 = setTimeout("defilimg()",5000);
  a++;
  }
 }
</script>