<!--

/* define image urls */

if (document.images)
 {
     pic1= new Image();
     pic1.src="images/van.gif";  
     pic2= new Image(); 
     pic2.src="images/straightTruck.gif"; 
     pic3= new Image();
     pic3.src="images/tractorTrailer.gif";  
 }    

var pics= new Array(3) 
   pics[0]=pic1.src;
   pics[1]=pic2.src;
   pics[2]=pic3.src;

var numpics=3;
var thenum=0;
imgName="img1";

function change_it()
 {
   if (document.images)
    {
      document.write("<img src='"+pics[thenum]+"' border='0' name='img1'>\n");
      setTimeout('change_it2()',8000);  
   }
}

function change_it2()
{
  var x=0;
  thenum+=1;

  if (thenum>numpics-1)
    thenum=0;

  document[imgName].src=pics[thenum];
  x+=1;
  setTimeout('change_it2()',3000);
}

function showSelect()
{
    if(document.getElementById('select'))
    {
        document.getElementById('select').style.visibility = "visible";
    }

    if(document.getElementById('select2'))
    {
        document.getElementById('select2').style.visibility = "visible";
    }

    if(document.getElementById('select3'))
    {
        document.getElementById('select3').style.visibility = "visible";
    }

    if(document.getElementById('select4'))
    {
        document.getElementById('select4').style.visibility = "visible";
    }

    if(document.getElementById('select5'))
    {
        document.getElementById('select5').style.visibility = "visible";
    }
}

function hideSelect()
{
    if(document.getElementById('select'))
    {
        document.getElementById('select').style.visibility = "hidden";
    }

    if(document.getElementById('select2'))
    {
        document.getElementById('select2').style.visibility = "hidden";
    }

    if(document.getElementById('select3'))
    {
        document.getElementById('select3').style.visibility = "hidden";
    }

    if(document.getElementById('select4'))
    {
        document.getElementById('select4').style.visibility = "hidden";
    }

    if(document.getElementById('select5'))
    {
        document.getElementById('select5').style.visibility = "hidden";
    }

}

//-->