function emailus(){
var nav = document.getElementById("emailus");
var newlinks = 'or <a href="contact-us.htm">click here</a>';

	nav.innerHTML = newlinks;
}


<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);


function TheFormCheck() {
if (document.form1.email.value=="") 
{
alert("email is required");
document.form1.email.focus();return false
}

if (document.form1.email.value!="") 
{if (document.form1.email.value.indexOf("@")==-1 || document.form1.email.value.indexOf(".")==-1 || document.form1.email.value.indexOf(" ")!=-1 || document.form1.email.value.length<6) 
{alert("Sorry, your email address is not valid.");
document.form1.email.focus();return false}
}
} 
function clearDefault(el) {
  if (el.defaultValue==el.value) el.value = ""
}