// JavaScript Document
function validatecontactform(form) {
	var email =form.emailAddress.value;
	var name =form.name.value;
	var reason =form.reason.value;
	var message =form.message.value;
	var captcha =form.captcha.value;
	var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
	if(email == "") {
        inlineMsg('emailAddress','Please enter email',2);
        return false;
    }
	if(!email.match(emailRegex)) {
        inlineMsg('emailAddress','You have entered an invalid email',2);
        return false;
    }
	if(name == "") {
        inlineMsg('name','Please enter name',2);
        return false;
    }
	if(reason == "") {
        inlineMsg('reason','Please select the reason',2);
        return false;
    }
	if(message == "") {
        inlineMsg('message','Please enter message',2);
        return false;
    }
	if(captcha == "") {
        inlineMsg('captcha','Please enter captcha',2);
        return false;
    }
	return true;
}

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
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 = "../imgs/msg_arrow.gif";
}