// JavaScript functions for image rollovers

// <!-- 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;
}
// stop hiding -->

// <!-- hide 
  if (document.images) {
    btn_profile_over = new Image(170 ,38); btn_profile_over.src = "images/btn_profile_over.jpg";
    btn_aops_over = new Image(170 ,38); btn_aops_over.src = "images/btn_aops_over.jpg";
    btn_staff_over = new Image(170 ,38); btn_staff_over.src = "images/btn_staff_over.jpg";
    btn_resources_over = new Image(170 ,38); btn_resources_over.src = "images/btn_resources_over.jpg";
    btn_contact_over = new Image(170 ,38); btn_contact_over.src = "images/btn_contact_over.jpg";
    btn_directions_over = new Image(170 ,38); btn_directions_over.src = "images/btn_directions_over.jpg";
  }
  
// stop hiding -->


// Check that required fields in contact form are filled in and email is valid
function checkRequiredFieldsContact(form) {
  if (form.name.value == '') {
    alert("Please enter Your Full Name.");
    return false;
  }
  email = form.email.value;
  if (email == '') {
    alert("Please enter your Email Address.");
    return false;
  }
  index = email.indexOf("@");
  if (index < 1 || index == email.length-1) {
    alert("The Email Address you entered is not valid.");
	return false;
  }  
  if (form.reason.value == '') {
    alert("Please select a Reason for Inquiry.");
    return false;
  }
  if (form.message.value == '') {
    alert("Please enter Your Message.");
    return false;
  }

  // Check that image verification field text matches
  user_txt = form.image_text.value.toLowerCase();  // Convert text to lowercase first
  if (user_txt != img_txt) {
    alert("The text you entered in the Image Verification field does not match.");
    return false;
  }

  return true;
}

// Function used to open Google map window and set focus to it
function openGoogleMapWindow(URL)
{
popup = window.open(URL,'Map','height=520,width=620,scrollbars=1,resizable=1');
popup.focus();
}