// JavaScript Document


<!-- hide
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_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;
}


  <!-- hide 
  if (document.images) {
  nav_whatisit_f2 = new Image(150 ,19); nav_whatisit_f2.src = "nav_whatisit_f2.gif";
  nav_whatisit_f1 = new Image(150 ,19); nav_whatisit_f1.src = "nav_whatisit.gif";
  nav_whatcanitdo_f2 = new Image(150 ,1); nav_whatcanitdo_f2.src = "nav_whatcanitdo_f2.gif";
  nav_whatcanitdo_f1 = new Image(150 ,1); nav_whatcanitdo_f1.src = "nav_whatcanitdo.gif";
  nav_r3_c2_f2 = new Image(150 ,17); nav_r3_c2_f2.src = "nav_r3_c2_f2.gif";
  nav_r3_c2_f1 = new Image(150 ,17); nav_r3_c2_f1.src = "nav_r3_c2.gif";
  nav_easy_f2 = new Image(150 ,2); nav_easy_f2.src = "nav_easy_f2.gif";
  nav_easy_f1 = new Image(150 ,2); nav_easy_f1.src = "nav_easy.gif";
  nav_r5_c2_f2 = new Image(150 ,17); nav_r5_c2_f2.src = "nav_r5_c2_f2.gif";
  nav_r5_c2_f1 = new Image(150 ,17); nav_r5_c2_f1.src = "nav_r5_c2.gif";
  nav_samples_f2 = new Image(150 ,1); nav_samples_f2.src = "nav_samples_f2.gif";
  nav_samples_f1 = new Image(150 ,1); nav_samples_f1.src = "nav_samples.gif";
  nav_r7_c2_f2 = new Image(150 ,19); nav_r7_c2_f2.src = "nav_r7_c2_f2.gif";
  nav_r7_c2_f1 = new Image(150 ,19); nav_r7_c2_f1.src = "nav_r7_c2.gif";
  nav_signin_f2 = new Image(150 ,20); nav_signin_f2.src = "nav_signin_f2.gif";
  nav_signin_f1 = new Image(150 ,20); nav_signin_f1.src = "nav_signin.gif";
  nav_ordernow_f2 = new Image(151 ,20); nav_ordernow_f2.src = "nav_ordernow_f2.gif";
  nav_ordernow_f1 = new Image(151 ,20); nav_ordernow_f1.src = "nav_ordernow.gif";
  }
  // stop hiding -->