The power of DIV with IFRAME - Creating your own library to write dynamic content to IFRAME: utility functions
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The following function may be used to resize the IFRAME dynamically.
IFrameBox.prototype.Resize = function(wdth)
{
if( IFrameBox.IsBrowserIE() )
{
var div = frames[this.id].document.getElementById(this.DivID);
if(!wdth)
this.IFrame.style.width = div.offsetWidth;
else
this.IFrame.style.width = wdth;
this.IFrame.style.height = div.offsetHeight;
}
else
{
this.IFrame.style.width = this.Width;
this.IFrame.style.height = this.Height;
}
}
The following function may be used to place an IFRAME at required positions on the web page:
IFrameBox.prototype.PlaceAt = function(x, y)
{
this.IFrame.style.position = "absolute";
this.IFrame.style.left = x;
this.IFrame.style.top = y;
}
The following function tests whether the current IFRAME is in the visible state or not:
IFrameBox.prototype.IsVisible = function()
{
var ifrm = document.getElementById(this.id);
if( ifrm.style.visibility == "visible" && ifrm.style.width > 0 )
return true;
else
return false;
}
The following function makes an IFRAME visible (make sure that it uses some of the functions defined above).
IFrameBox.prototype.Show = function(evt, msg, wdth)
{
if( this.IsVisible() )
return;
var div = frames[this.id].document.getElementById(this.DivID);
div.innerHTML=msg;
this.Resize(wdth);
if(evt)
{
this.PlaceAt((evt.x +10),(evt.y +10));
}
this.IFrame.style.visibility = "visible";
this.IFrame.style.zIndex = "999999";
}
Hiding an IFRAME is the simplest of all. You can define the function as follows:
IFrameBox.prototype.Hide = function()
{
this.IFrame.style.visibility = "hidden";
this.IFrame.style.width = 0;
this.IFrame.style.height = 0;
}
I leave it to the programmers to further extend the library to suit their needs. The above set of functions is very suitable for presenting eye-catching tool tips on your web page. As the tool tips are based on IFRAME, they are naturally displayed ahead of any windowed controls (like dropdown lists and so on).
Any comments, suggestions, ideas, improvements, bugs, errors, feedback etc. are highly appreciated at jag_chat@yahoo.com.
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