A lightweight javascript tooltip
//
// ToolTip
//
// source: http://sixrevisions.com/tutorials/javascript_tutorial/create_lightweight_javascript_tooltip/
var tooltip = function () {
var id = 'tt';
var top = 3;
var left = 3;
var maxw = 300;
var speed = 10;
var timer_show = 100, timer_hide = 5;
var endalpha = 95;
var alpha = 0;
var tt,t,c,b,h,d;
var ie = document.all ? true : false;
return{
show:function(v,w){
if(tt == null){
tt = document.createElement('div');
tt.setAttribute('id',id);
t = document.createElement('div');
t.setAttribute('id',id + 'top');
d = document.createElement('div');
d.setAttribute('id',id + 'chk');
c = document.createElement('div');
c.setAttribute('id',id + 'cont');
b = document.createElement('div');
b.setAttribute('id',id + 'bot');
tt.appendChild(t);
tt.appendChild(d);
tt.appendChild(c);
tt.appendChild(b);
document.body.appendChild(tt);
tt.style.opacity = 0;
tt.style.filter = 'alpha(opacity=0)';
document.onmousemove = this.pos;
}
tt.style.display = 'block';
c.innerHTML = v;
d.innerHTML = v;
tt.style.width = d.offsetWidth;
//tt.style.width = w ? w + 'px' : 'auto';
if(!w && ie){
t.style.display = 'none';
b.style.display = 'none';
tt.style.width = tt.offsetWidth;
t.style.display = 'block';
b.style.display = 'block';
}
if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
h = parseInt(tt.offsetHeight) + top;
clearInterval(tt.timer);
tt.timer = setInterval(function(){tooltip.fade(1)},timer_show);
},
pos:function(event){
var u = ie ? event.clientY + document.documentElement.scrollTop : event.pageY;
var l = ie ? event.clientX + document.documentElement.scrollLeft : event.pageX;
tt.style.top = (u - h) + 'px';
tt.style.left = (l + left) + 'px';
},
fade:function(d){
var a = alpha;
if((a != endalpha && d == 1) || (a != 0 && d == -1)){
var i = speed;
if(endalpha - a < speed && d == 1){
i = endalpha - a;
}else if(alpha < speed && d == -1){
i = a;
}
alpha = a + (i * d);
tt.style.opacity = alpha * .01;
tt.style.filter = 'alpha(opacity=' + alpha + ')';
}else{
clearInterval(tt.timer);
if(d == -1){tt.style.display = 'none'}
}
},
hide:function(){
if (tt==null) return;
clearInterval(tt.timer);
tt.timer = setInterval(function(){tooltip.fade(-1)},timer_hide);
}
};
}();