String.prototype.trim = function () {
    return this.replace(/^\s*/, "").replace(/\s*$/, "");
}

// form validation function //
function validate(form) {


	var c_name = form.name.value;

	var c_email = form.email.value;
	var c_address = form.address.value;
	var c_city = form.city.value;
	var c_state = form.state.value;
	var c_zip = form.zip.value;
	var c_phone = form.phone.value;
		
	c_name = c_name.trim();

	c_email = c_email.trim();
	c_address = c_address.trim();
	c_city = c_city.trim();
	c_state = c_state.trim();
	c_zip = c_zip.trim();
	c_phone = c_phone.trim();
	c_email = c_email.toLowerCase(); 
    var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
    var zipRegex = /^\d{5}$|^\d{5}-\d{4}$/;

	
	if(c_name == "") { 
		inlineMsg('name','You must enter your name',2);
		return false;
	}
    if(c_address == "") {
    	inlineMsg('address','You must provide a mailing address',2);
    	return false;
    }
    if(c_city == "") {
    	inlineMsg('city','You must provide a city',2);
    	return false;
    }
    if(c_state == "") {
    	inlineMsg('state','You must provide a state',2);
    	return false;
    }
    if(c_zip == "") {
    	inlineMsg('zip','Please provide a zip code',2);
    	return false;
    }
    if(!c_zip.match(zipRegex)) {
  	inlineMsg('zip','<strong>Error</strong><br />Invalid zip code format.',2);
  	return false;
  	}
  	if(c_email == "") {
		inlineMsg('email','You must provide an email address',2);
		return false;
	}
	if(!c_email.match(emailRegex)) {
    inlineMsg('email','<strong>Error</strong><br />You have entered an invalid email.',2);
    return false;
    }
    if(c_phone == "") {
    	inlineMsg('phone','Phone number is required',2);
    	return false;
    }

 
  return true;
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 3;
var MSGSPEED = 10;
var MSGOFFSET = 3;
var MSGHIDE = 4;

// 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 = "../gfx/msg_arrow.gif"; 
}