Custom Alert Box

I've tested it in most recent versions of IE, FF, Opera, and Safari.

The first parameter is the alert's text, if a second parameter is passed, it is the alert's title, else it will just have "Alert" in the title.

You can fire the function as many times as you like, any alert's thrown after the first will set themselves on top of each other slightly staggered much like the built in alert.

The alert will automatically be placed in a visible place regardless of where the page has scrolled. They will also stay in that same place in relation to the screen if the user scrolls after the alert has fired.

The top most alert is the only one clickable and moveable until it has been acknowledged (Much like a regular alert).

The benefit of this is that it does not freeze the user's interface once the alert is thrown.

Here's the code:

Javascript:

//*****************************
// Custom Alert Box
// Free to use with credits in tact.
// Written By Adam Matthews aka Basscyst
//AdamDMatthews@Gmail.com
//*****************************
function msgBox(msg,hdr){
if(!document.getElementById('alerts')){
var div=document.createElement('div');
div.setAttribute('id','alerts');
document.body.appendChild(div);
}
var div=document.createElement('div');
div.className="alertbox";
var h3=document.createElement('h3');
h3.className="alerttitle";
var p=document.createElement('p');
p.className="alerttxt";
var footdiv=document.createElement('p');
footdiv.className="alertfoot";
div.appendChild(h3);
div.appendChild(p);
div.appendChild(footdiv);
var but=document.createElement('input');
but.setAttribute('type','button');
but.className='alertbut'
but.setAttribute('value','OK');
footdiv.appendChild(but);
var hdr=(hdr) ? hdr : "Alert!";
h3.appendChild(document.createTextNode(hdr));
var cut=msg.split("
");
var len=cut.length;
p.appendChild(document.createTextNode(cut[0]));
for(var i=1;i<len;i++){
p.appendChild(document.createElement('br'));
p.appendChild(document.createTextNode(cut[i]));
}
document.getElementById('alerts').appendChild(div);
window.onscroll=function(){
placeAlerts();
}
window.onresize=function(){
placeAlerts();
}
placeAlerts();
}
var posX;
var posY;
function mouseXY(e){
if (!e){
var e = window.event;
}
if (e.clientX)
{
posX = e.clientX + document.documentElement.scrollLeft;
posY = e.clientY + document.documentElement.scrollTop;
}
else
{
posX = Math.max(e.pageX,0);
posY = Math.max(e.pageY,0);
}
var coord=new Array();
return coord;
}
if(document.captureEvents){
document.captureEvents(Event.MOUSEMOVE)
}
function placeAlerts(){
var alerts=document.getElementById('alerts').getElementsByTagName('div');
var len=alerts.length;
var x=0;
var y=300;
var w=document.body.clientWidth;
var h=document.body.clientHeight;
for(var i=0;i<len;i++){
alerts[i].style.zIndex=i+100;
alerts[i].getElementsByTagName('h3')[0].onmousedown="";
alerts[i].getElementsByTagName('input')[0].onclick="";

if(window.pageYOffset){
alerts[i].style.top=y+(window.pageYOffset)+'px'
}else{
alerts[i].style.top=y+(document.documentElement.scrollTop)+'px'
}
alerts[i].style.left=(w / 2)- (343 / 2) + x +'px';
x=x+15;
y=y+15;
if(i==len-1){
var h3=alerts[i].getElementsByTagName('h3')[0];
var but=alerts[i].getElementsByTagName('input')[0];
but.onclick=function(){
this.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode);
var alerts=document.getElementById('alerts').getElementsByTagName('div');
if(alerts.length==0){
window.onscroll="";
}
placeAlerts();
}
h3.onmousedown=function(event){
this.parentNode.setAttribute('id','active_alert');
var event=(event)?event:arguments[0];
mouseXY(event);
start_x=posX;
start_left=document.getElementById('active_alert').style.left.replace('px','');
adjust=posX-start_left;
document.onmousemove=function(event){
var event=(event)?event:arguments[0];
mouseXY(event);
var obj=document.getElementById('active_alert');
obj.style.left=posX-adjust+'px'
obj.style.top=posY-5+'px'
};
}
h3.onmouseup=function(){
document.onmousemove="";
this.parentNode.setAttribute('id','');
}
}
}
}

Function Call

msgBox("You have done something real bad!
So Bad, oh so bad!","Ya shoudn't of done it boy!")


CSS

.alertbox{
width:344px;
position:absolute;
padding:0px;
margin:0px;
border:solid 1px #FFFFFF;
}
.alerttitle{
background-color:#9B1317;
color:#FFFFFF;
font-size:12px;
width:344px;
cursor:pointer;
text-align:center;
margin:0px;
padding:0px;
}
.alerttxt{
background-color:#E7EFF7;
margin:0px;
font-size:11px;
text-align:center;
padding:0px;
width:344px;
}
.alertfoot{
background-color:#9B1317;
text-align:center;
width:344px;
margin:0px;
padding:0px;
}
.alertbut{
margin-top:2px;
cursor:pointer;
}