// JavaScript Document
function validate(form) {
  var Name = form.Name.value;
  var Email = form.Email.value;
  var Site_Name = form.Site_Name.value;
  var web_address = form.web_address.value;
  var Description = form.Description.value;
  var Links_back_URL = form.Links_back_URL.value; 
  var security_code2 = form.security_code2.value;
  
  var NameRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/;      
  var EmailRegex = /^[a-z\d]+([\.\-_][a-z\d]+)*@[a-z\d]+([\.\-_][a-z\d]+)*\.[a-z]{2,5}/i;   
  var Site_NameRegex = /^([ \u00c0-\u01ffa-zA-Z'\-\.])+$/;
  var web_addressRegex = /http[s]?:\/\/(?:(?:[^\.]+)?\.)*([^\.]{3,}\.(?:[\w]{2,7})(?:\.[\w]{2,3})?)(?::[\d]+)?/;
  var DescriptionRegex = new RegExp(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[^'">\s]+))?)+\s*|\s*)\/?>/gim);
  var Links_back_URLRegex = /http[s]?:\/\/(?:(?:[^\.]+)?\.)*([^\.]{3,}\.(?:[\w]{2,7})(?:\.[\w]{2,3})?)(?::[\d]+)?/;
  
  if(Name == "") {
    inlineMsg('Name','You must enter your name.',2);
    return false;
  }
  if(!Name.match(NameRegex)) {
    inlineMsg('Name','You have entered an invalid name.',2);
    return false;
  }
  if(Email == "") {
    inlineMsg('Email','You must enter your email.',2);
    return false;
  }
  if(!Email.match(EmailRegex)) {
    inlineMsg('Email','You have entered an invalid email.',2);
    return false;
  }
  if(Site_Name == "") {
    inlineMsg('Site_Name','You must enter your site name.',2);
    return false;
  }
  if(!Site_Name.match(Site_NameRegex)) {
    inlineMsg('Site_Name','You have entered an invalid site name.',2);
    return false;
  }  
  if(web_address == "") {
    inlineMsg('web_address','You must enter your URL.',2);
    return false;
  }
  if(web_address != "" && !web_address.match(web_addressRegex)) {
    inlineMsg('web_address','You have entered an invalid url.',2);
    return false;
  }  
  if(Description == "") {
    inlineMsg('Description','You must enter a description for your site.',2);
    return false;
  }
  if(Description.match(DescriptionRegex)) {
    inlineMsg('Description','You have entered an invalid description.',2);
    return false;
  }
  if(Links_back_URL == "") {
    inlineMsg('Links_back_URL','You must enter a return URL.',2);
    return false;
  }
  if(Links_back_URL != "" && !Links_back_URL.match(Links_back_URLRegex)) {
    inlineMsg('Links_back_URL','You have entered an invalid url.',2);
    return false;
  }
   if(security_code2 == "") {
    inlineMsg('security_code2','You must enter the security code.',2);
    return false;
  }
  return true;
}
function CheckTA()
{
  var max=250, texthalt;

  texthalt=document.getElementById('Description').value;

  if (texthalt.length >= max)
	{
	document.getElementById('Description').value=texthalt.substring(0,max);
	document.getElementById('Description').value.blur();
	}
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 4;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "../images/msg_arrow.gif"; 
}