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The power of DIV with IFRAME


This article mainly explains the benefits of using DIV to write dynamic content to IFRAME. I shall also guide you in developing your own library of functions to work with IFRAME effectively.

Author Info:
By: Jagadish Chaterjee
Rating: 4 stars4 stars4 stars4 stars4 stars / 78
March 08, 2006
TABLE OF CONTENTS:
  1. · The power of DIV with IFRAME
  2. · Using a DIV as variable to write into IFRAME: discussion
  3. · Making DIV more dynamic to write into IFRAME
  4. · Creating your own library to write dynamic content to IFRAME: essentials
  5. · Creating your own library to write dynamic content to IFRAME: utility functions

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The power of DIV with IFRAME - Creating your own library to write dynamic content to IFRAME: utility functions
(Page 5 of 5 )

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.


DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

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