Solved

display:none; element height issue, ifarme shim - multiple colapsable divs

Posted on 2008-06-17
4
1,340 Views
Last Modified: 2013-11-19
Hi All,

I have a the need for a menu (lets call it 'FON - float over nav') to position itself over the main workspace. I have a number of divs that open and close onclick using display:none; function that works great.

The problem comes with IE6 where by the FON has select feilds shining through, no problem I thought and added an iframe shim.

However, dependent on the page load state of the FON, if open I get a height say 300px, if closed I get 0px. When I open the FON from a closed start state the iframe doesn't catch up, i.e. it doesn't pick up the hieght of the now open FON's containing div.

To compound the matter I have colapsible sub elements within the containing FON div.

Is there any way to catch the height on changing the div's state from display:none; to display:'';

Heres an example of the code.


<html>

<head>

<script type="text/javascript">

    <!--

        function hideshow(element) {

                if (element.style.display=="none") 

                {

                    element.style.display="";

                } 

                else 

                {

                    element.style.display="none";

                }

        }

	-->

</script>

</head>

<body>

<div id="toolsleft" onclick="hideshow(document.getElementById('toolsleftopencont'));" title="expand">OPEN/CLOSE THE NAV</div>  
 

<div id="toolsleftopencont" style="display:none;">
 

    <h2 onclick="hideshow(document.getElementById('navgroup1'));hideshow(document.getElementById('navgroup1closed'));">Nav Item Group header</h2>
 

    <div id="navgroup1">
 

        <ul>

            <li>Nav Item</li>

            <li>Nav Item</li>

            <li>Nav Item</li>

            <li onclick="hideshow(document.getElementById('subcont1'));">Expandable Item</li>

            <li id="subcont1" class="subcont" style="display:none;">         

                <ul>

                    <li>Sub Nave Item</li>

                    <li>Sub Nave Item</li>

                    <li>Sub Nave Item</li>

                </ul> 

            </li>  

            <li>Nav Item</li>

            <li>Nav Item</li>

        </ul> 

        

    </div><!-- #navgroup1 -->

    

    <!-- Repeat navs as necessary -->

            

</div><!-- #toolsleftopencont -->
 

<!--[if lt IE 7]>	

<script type="text/javascript">

	var ltoolsH = document.getElementById('toolsleftopencont').offsetHeight;

	alert(ltoolsH);       

	//transparent iframe shim to block select fields from shining through

	document.write("<iframe id='toolsleftiframe' src='BLOCKED SCRIPTfalse;' style='height:"+ltoolsH+"px;position:absolute;z-index:-1;width:100%;filter:mask();'></iframe>");

</script>    

<![endif]-->

</body>

</html>

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Comment
Question by:canibefrank
  • 2
  • 2
4 Comments
 
LVL 28

Accepted Solution

by:
Pravin Asar earned 500 total points
ID: 21814473
Here is a one option, which resize the iframe based on the size of div

 
<html>

<head>

<script type="text/javascript">

    <!--

// Absolute Position

function GetTagPixels(StartTag, Direction) {

   var PixelAmt = (Direction == 'LEFT') ? StartTag.offsetLeft : StartTag.offsetTop;

   while ((StartTag.tagName != 'BODY') && (StartTag.tagName != 'HTML')) {

      StartTag = StartTag.offsetParent;

      PixelAmt += (Direction == 'LEFT') ? StartTag.offsetLeft : StartTag.offsetTop;

   }

   return PixelAmt;

}

// Relative to container
 

function GetTagPosition (tagObj) {

	this.x = tagObj.offsetLeft;

	this.y = tagObj.offsetTop;

    return (this);

}

// Tag Dimension 

function GetTagDimension (tagObj) {

	this.width = tagObj.offsetWidth;

	this.height = tagObj.offsetHeight;

    return (this);

}

        function hideshow(element) {

                if (element.style.display=="none") 

                {

                    element.style.display="block";

                } 

                else 

                {

                    element.style.display="none";

                }

				adjustiframe();

        }

		function adjustiframe() {

		var dTag = document.getElementById('toolsleftopencont');

		var yMargin = 20;

		var xMargin = 20;

		var xpos = GetTagPixels (dTag, "LEFT");

   		var ypos = GetTagPixels (dTag, "TOP");

   		var dim  = GetTagDimension (dTag);

		var iframe = document.getElementById ('toolsleftiframe');

		iframe.style.height =dim.height + yMargin;

		iframe.style.width =dim.width + xMargin;

		}

        -->

</script>

</head>

<body>

<div id="toolsleft" onclick="hideshow(document.getElementById('toolsleftopencont'));" style="position:absolute; z-index:10;left: 10px; top: 10px;" title="expand">OPEN/CLOSE THE NAV</div>   

<div id="toolsleftopencont" style="display:none; width: 400px;">

 

    <h2 onclick="hideshow(document.getElementById('navgroup1'));hideshow(document.getElementById('navgroup1closed'));">Nav Item Group header</h2>

 

    <div id="navgroup1">

 

        <ul>

            <li>Nav Item</li>

            <li>Nav Item</li>

            <li>Nav Item</li>

            <li onclick="hideshow(document.getElementById('subcont1'));">Expandable Item</li>

            <li id="subcont1" class="subcont" style="display:none;">         

                <ul>

                    <li>Sub Nave Item</li>

                    <li>Sub Nave Item</li>

                    <li>Sub Nave Item</li>

                </ul> 

            </li>  

            <li>Nav Item</li>

            <li>Nav Item</li>

        </ul> 

        

    </div><!-- #navgroup1 -->

    

    <!-- Repeat navs as necessary -->

            

</div><!-- #toolsleftopencont -->

<div style="position:absolute; z-index:-1; top:0px; left: 0px;">

<iframe id="toolsleftiframe" src="" style="width: 300px; height:200px; ">

</iframe>

</div>

 

<!--[if lt IE 7]>       

<script type="text/javascript">

        var ltoolsH = document.getElementById('toolsleftopencont').offsetHeight;

        alert(ltoolsH);       

        //transparent iframe shim to block select fields from shining through

        document.write("<iframe id='toolsleftiframe' src='BLOCKED SCRIPTfalse;' style='height:"+ltoolsH+"px;position:absolute;z-index:-1;width:100%;filter:mask();'></iframe>");

</script>    

<[endif]-->

</body>

</html>

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Author Comment

by:canibefrank
ID: 21820618
Hi pravinasar,

That fits the bill perfectly, your a star thanks a lot.
0
 

Author Closing Comment

by:canibefrank
ID: 31467991
Nice one works a treat, exactly whta was required. Thanks.
0
 
LVL 28

Expert Comment

by:Pravin Asar
ID: 21824787
Glad to be of some help.

Thanks for the Grade.

-PA
0

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