/*
 * Global variables
 */
var pages = ["home", "about", "contact", "media", "events", "links", "advertising"];  // ID of each page container
var opacity = new Array(); // Array to hold all opacity objects

var inProgress = false;    // Prevents concurrent page loads
var currPage = 0;          // Index of current page
var DURATION = 450;        // Duration of opacity change


/*
 * Creates all the page opacity and height objs
 */
function init(){

  // Create a opacity object for each page
  for(var i = 0; i < pages.length; i++)
    opacity[opacity.length] = new fx.Opacity(pages[i], {duration: DURATION});  


  // Just had a successful contact submission
  if(getURLParam("contact") == 1){
    // Hide every page except contact form
    for(var i = 0; i < pages.length-1; i++){
      opacity[i].hide();
      $(pages[i]).style.display = "none";
    }
    // Display success message
    $('success').style.display = "block";
    
    // Turn the contact menu item on
    $('link'+currPage).className = "";
    $('link3').className = "here";      
    
    // Set the currPage
    currPage = 3;
  
  } else {  
    // Hide every page except first one
    for(var i = 1; i < pages.length; i++){
      opacity[i].hide();
      $(pages[i]).style.display = "none";
    }   
  }
  
 
}


/*
 * Gets params from the url
 */
function getURLParam(strParamName){
  var strReturn = null;
  var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
    var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
      if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
        var aParam = aQueryString[iParam].split("=");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return strReturn;
}


/*
 * Loads a new page based on it's index
 */
function load(page){   

  // Check to make sure previous page loads have finished
  if(inProgress) return;
  
  // Don't go ahead if it's the same page
  if(currPage != page){      
    inProgress = true;
  
    $('link'+currPage).className = "";
    $('link'+page).className = "here";        
    
    opacity[currPage].custom(1,0);
    setTimeout("$(pages["+currPage+"]).style.display = 'none';completeLoad("+page+");", DURATION);        
  }    
}


/*
 * Completes the load of a new page (toggle opacity on)
 */
function completeLoad(page){
  // Load the page content
  $('success').style.display = "none";
  $(pages[page]).style.display = "block";   
  opacity[page].custom(0,1);      

  currPage = page;  
  setTimeout("inProgress=false;", DURATION); 
}



function printEmail(){
  var start = "&#100;&#106;&#105;&#108;&#108;&#105;&#111;&#110;&#115;";
  var middle = "&#64;";
  var end = "&#115;&#121;&#109;&#112;&#97;&#116;&#105;&#99;&#111;&#46;&#99;&#97;";
  document.write(start + middle + end);
}


/*
 *  Form Validation
 */

function validateForm(f){
  
  var errors = "ERROR | Please do the following:\n\n";
  var count = 0;
  var errField = null;
  
  for(var i = 0; i < f.elements.length; i++){
    var field = f.elements[i];  

    var type = field.type;
    var value = field.value;
    var name = field.name;
    
    // Not checking optional or disabled
    if(field.isOptional || field.disabled) continue;
    
    if(type == "text" || type == "textarea" || type == "select-one" || type == "password" || type == "file") {
      
      // Empty check
      if(isEmpty(value)) {
        errors += (++count) + ". " + convertName(name) + " (cannot be left blank)\n";        
        continue;
      }   
    
      // Email check
      if(field.isEmail && !isEmail(value)) {
        errors += (++count) + ". " + convertName(name) + " must be a valid address\n";
        continue;
      }  
      
      errField = (!errField) ? errField = field : errField;
    }
  }
  
  if(count > 0) {
    alert(errors);    
    if(errField) errField.focus();    
    return false;
  }   
  return true;
}

function isEmpty(str){
  return (str == null) || (trim(str).length == 0);
}

function isEmail(str){
  var re = /^[^\s()<>@,;:\/]+@\w[\w\.-]+\.[a-z]{2,}$/i
  return re.test(str);
}

function trim(str){
  return str.replace( /\s+$/g, "" );
}

function convertName(str){
  str = str.charAt(0).toUpperCase() + str.substr(1);
  return str.replace(/_/g, " ");
}

function setFieldFocus(form){  
  
  if(form != null && form.elements[0] != null) {  
    for(var i = 0; i < form.length; i++){
      if(form.elements[i].type != "hidden" &&
         !form.elements[i].disabled &&
         !form.elements[i].readOnly){
           form.elements[i].focus();
           break;         
      }    
    }
  }
}