Show Hint script

Posted on January 29, 2008
by Blog.thegioiwebsite.Net Học Javascripts |


Description: "Show Hint" script displays an attractive hint box containing additional explanation on any item on your page. A hint box pops up next to the item when the mouse moves over it with relevant hints or useful information. A classic use of "Show Hint" is with your form fields, to better explain to the user how to fill them out.

We could all use a good hint, that's for sure!

 Live demo ( Xem ví dụ )

Step 1: Add the below script to the <HEAD> section of your page:

 <style type="text/css">
#hintbox{ /*CSS for pop up hint box */
position:absolute;
top: 0;
background-color: lightyellow;
width: 150px; /*Default width of hint.*/
padding: 3px;
border:1px solid black;
font:normal 11px Verdana;
line-height:18px;
z-index:100;
border-right: 3px solid black;
border-bottom: 3px solid black;
visibility: hidden;
}

.hintanchor{ /*CSS for link that shows hint onmouseover*/
font-weight: bold;
color: navy;
margin: 3px 8px;
}

</style>

<script type="text/javascript">

/***********************************************
* Show Hint script- © Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/
        
var horizontal_offset="9px" //horizontal offset of hint box from anchor link

/////No further editting needed

var vertical_offset="0" //horizontal offset of hint box from anchor link. No need to change.
var ie=document.all
var ns6=document.getElementById&&!document.all

function getposOffset(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function clearbrowseredge(obj, whichedge){
var edgeoffset=(whichedge=="rightedge")? parseInt(horizontal_offset)*-1 : parseInt(vertical_offset)*-1
if (whichedge=="rightedge"){
var windowedge=ie && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-30 : window.pageXOffset+window.innerWidth-40
dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure+obj.offsetWidth+parseInt(horizontal_offset)
}
else{
var windowedge=ie && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure-obj.offsetHeight
}
return edgeoffset
}

function showhint(menucontents, obj, e, tipwidth){
if ((ie||ns6) && document.getElementById("hintbox")){
dropmenuobj=document.getElementById("hintbox")
dropmenuobj.innerHTML=menucontents
dropmenuobj.style.left=dropmenuobj.style.top=-500
if (tipwidth!=""){
dropmenuobj.widthobj=dropmenuobj.style
dropmenuobj.widthobj.width=tipwidth
}
dropmenuobj.x=getposOffset(obj, "left")
dropmenuobj.y=getposOffset(obj, "top")
dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+obj.offsetWidth+"px"
dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+"px"
dropmenuobj.style.visibility="visible"
obj.onmouseout=hidetip
}
}

function hidetip(e){
dropmenuobj.style.visibility="hidden"
dropmenuobj.style.left="-500px"
}

function createhintbox(){
var divblock=document.createElement("div")
divblock.setAttribute("id", "hintbox")
document.body.appendChild(divblock)
}

if (window.addEventListener)
window.addEventListener("load", createhintbox, false)
else if (window.attachEvent)
window.attachEvent("onload", createhintbox)
else if (document.getElementById)
window.onload=createhintbox

</script>

 

 

Step 2: Add the below sample form to your page, which shows "Hint Me" in action:

<form>
<b>Username:</b> <input type="text" class="test" /> <a href="#" class="hintanchor" onMouseover="showhint('Please choose a username. Should consist of alphanumeric characters only.', this, event, '150px')">[?]</a><br />
<b>Password:</b>  <input type="text" class="test" /> <a href="#" class="hintanchor" onMouseover="showhint('Enter the desired password. <b>Must</b> be 8 characters or longer.', this, event, '200px')">[?]</a><br />
</form>

More Information

As seen in the code of Step 2, the entire HTML for a hint consist of:

<a href="#" class="hintanchor" onMouseover="showhint('Please choose a username. Should consist of alphanumeric characters only.', this, event, '150px')">[?]</a>

The part in red, function showhint(), is what you need to customize for each one of your hints:

showhint('hint_here', this, event, 'hint_width')"

The first parameter, "hint_here", is the text for your hint. HTML is supported (ie: "<b>must</b>"), though if it contains apostrophes, be sure to backslash them (ie: "I\'m the king of the world").

The fourth parameter is an optional width of the hint box. If you omit this parameter, the default width as specified in the CSS is used.


 


Bookmark


Comments

Leave a Reply