function showHelpTip(e, sHtml, bHideSelects) {
// find anchor element
var el = e.target || e.srcElement;
while (el.tagName != "A")
el = el.parentNode;
// is there already a tooltip? If so, remove it
if (el._helpTip) {
helpTipHandler.hideHelpTip(el);
}
helpTipHandler.hideSelects = Boolean(bHideSelects);
// create element and insert last into the body
helpTipHandler.createHelpTip(el, sHtml);
// position tooltip
helpTipHandler.positionToolTip(e);
// add a listener to the blur event.
// When blurred remove tooltip and restore anchor
el.onblur = helpTipHandler.anchorBlur;
el.onkeydown = helpTipHandler.anchorKeyDown;
}
var helpTipHandler = {
hideSelects: false,
helpTip: null,
showSelects: function (bVisible) {
if (!this.hideSelects) return;
// only IE actually do something in here
var selects = [];
if (document.all)
selects = document.all.tags("SELECT");
var l = selects.length;
for (var i = 0; i < l; i++)
selects[i].runtimeStyle.visibility = bVisible ? "" : "hidden";
},
create: function () {
var d = document.createElement("DIV");
d.className = "help-tooltip";
d.onmousedown = this.helpTipMouseDown;
d.onmouseup = this.helpTipMouseUp;
document.body.appendChild(d);
this.helpTip = d;
},
createHelpTip: function (el, sHtml) {
if (this.helpTip == null) {
this.create();
}
var d = this.helpTip;
d.innerHTML = sHtml;
d._boundAnchor = el;
el._helpTip = d;
return d;
},
// Allow clicks on A elements inside tooltip
helpTipMouseDown: function (e) {
var d = this;
var el = d._boundAnchor;
if (!e) e = event;
var t = e.target || e.srcElement;
while (t.tagName != "A" && t != d)
t = t.parentNode;
if (t == d) return;
el._onblur = el.onblur;
el.onblur = null;
},
helpTipMouseUp: function () {
var d = this;
var el = d._boundAnchor;
el.onblur = el._onblur;
el._onblur = null;
el.focus();
},
anchorBlur: function (e) {
var el = this;
helpTipHandler.hideHelpTip(el);
},
anchorKeyDown: function (e) {
if (!e) e = window.event
if (e.keyCode == 27) { // ESC
helpTipHandler.hideHelpTip(this);
}
},
removeHelpTip: function (d) {
d._boundAnchor = null;
d.style.filter = "none";
d.innerHTML = "";
d.onmousedown = null;
d.onmouseup = null;
d.parentNode.removeChild(d);
//d.style.display = "none";
},
hideHelpTip: function (el) {
var d = el._helpTip;
/* Mozilla (1.2+) starts a selection session when moved
and this destroys the mouse events until reloaded
d.style.top = -el.offsetHeight - 100 + "px";
*/
d.style.visibility = "hidden";
//d._boundAnchor = null;
el.onblur = null;
el._onblur = null;
el._helpTip = null;
el.onkeydown = null;
this.showSelects(true);
},
positionToolTip: function (e) {
this.showSelects(false);
var scroll = this.getScroll();
var d = this.helpTip;
// width
if (d.offsetWidth >= scroll.width)
d.style.width = scroll.width - 10 + "px";
else
d.style.width = "";
// left
if (e.clientX > scroll.width - d.offsetWidth)
d.style.left = scroll.width - d.offsetWidth + scroll.left + "px";
else
d.style.left = e.clientX - 2 + scroll.left + "px";
// top
if (e.clientY + d.offsetHeight + 18 < scroll.height)
d.style.top = e.clientY + 18 + scroll.top + "px";
else if (e.clientY - d.offsetHeight > 0)
d.style.top = e.clientY + scroll.top - d.offsetHeight + "px";
else
d.style.top = scroll.top + 5 + "px";
d.style.visibility = "visible";
},
// returns the scroll left and top for the browser viewport.
getScroll: function () {
if (document.all && typeof document.body.scrollTop != "undefined") { // IE model
var ieBox = document.compatMode != "CSS1Compat";
var cont = ieBox ? document.body : document.documentElement;
return {
left: cont.scrollLeft,
top: cont.scrollTop,
width: cont.clientWidth,
height: cont.clientHeight
};
}
else {
return {
left: window.pageXOffset,
top: window.pageYOffset,
width: window.innerWidth,
height: window.innerHeight
};
}
}
};