JS to tell if an object is viewable on the screen

Here is some JavaScript that has a function to tell if an object 
is viewable on the screen.
This is quite helpful if you have something on the screen you 
want to make sure the user sees,

like a an error or license agreement, etc.
function isinView(oObject)
    var oParent = oObject.offsetParent;
    var iOffsetTop = oObject.offsetTop;
    var iClientHeight = oParent.clientHeight;
    if (iOffsetTop > iClientHeight) {
        alert("Special Text not in view. Expand Window to put Text in View.");
         alert("Special Text in View!");
<BODY onload="window.resizeTo(430,250)" onclick="isinView(oID_1)"  SCROLL=NO>

<DIV STYLE="position:absolute;left:20px">Click anywhere in window to see if special text is in

<DIV id="oID_1" STYLE="position:absolute; left:50px;top:300px;width:280px;color:lightGreen;
            Here's some special text
Technorati Tags: ,

Got something to add?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s