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Body onUnload and onBeforeUnload

Posted on 2009-05-12
5
2,607 Views
Last Modified: 2013-12-08
Hi all,
I try to add a waiting page during the processing page.
 But I don't understand why I can't lunch the script in IE with onUnload action (work fine in FF).

 The id is simple, I display the message in each unloading and hide the waiting div in the onload.

I have two mistake :
                                 onUnload                 don't work in IE
                                                                 work fine for FF
                                 onBeforeUnload      work on IE but some action on onclick lunch it too
                                                                 work on FF but I lose the image in background ???

Thanks for your help or suggestions.

                                 

<body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onload="setup_box();" onbeforeUnload="show_loadmsg();">
 
setup_box :
if (document.getElementById('pleaseWaitDiv') != null) {document.getElementById(id).style.display = 'none';}
 
show_loadmsg :
	document.getElementById('pleaseWaitDiv').style.display = 'block';
	document.getElementById('loaderHaze').style.height = '4000px';
	document.getElementById('loaderHaze').style.width = '4000px';
	document.getElementById('loaderHaze').style.opacity = '0.7';
	document.getElementById('loaderHaze').style.filter = 'alpha(opacity=70)';	
 
My waiting div :
<div id="pleaseWaitDiv" style="display:none;" >
 
	<div id="loaderHaze" style="position:absolute;top:0px;left:0px;background-color:#chr(35)#FF0000;">
		&nbsp;
	</div>
	<div id="loaderBlock" style="width:410px;height:103px;background-image:url(img/#attributes.loader_img#);background-repeat:no-repeat;position:absolute;top:200px;left:36%;">
		<div id="loaderBlock_part1" style="position:absolute;top:15px;left:0px;text-align:center;width:410px;">
			#attributes.uper_txt#
		</div>
		<div style="width:374px;height:17px;position:absolute;top:44px;left:16px;">
			<img id="loaderBarImage" style="position:absolute;top:0px;left:0px;" alt="" src="img/#attributes.loader#" />
		</div>
 
		<div id="loaderBlock_part2" style="position:absolute;top:75px;left:0px;text-align:center;width:410px;">
			#attributes.lower_txt#
		</div>
	</div>
 
</div>

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Question by:boodyguard
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5 Comments
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 24372724
Please show a complete example (view-source - not template stuff) and tell us what IE you use
0
 
LVL 1

Author Comment

by:boodyguard
ID: 24380031
I have tested IE6 , IE7 and IE8.

Here is the source code of the file, i must hide all content (big public application, dont have the right to publie).
I hope it will help you.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html lang="en">
<head>
	
		<script type="text/javascript" language="javascript">
		// initialising the var for WaitingGif function 
var bDoSHSelect = false;
var bDoSHSelect2 = true;
 
function setup_box(id){
	id='pleaseWaitDiv';
	if (document.getElementById('pleaseWaitDiv') != null) {document.getElementById(id).style.display = 'none';}
// hide select object in the page
	if (bDoSHSelect) { shSelTag('show'); }
	document.body.scroll='yes';
}
 
// display the waiting gif
function show_loadmsg(){
	pyd_dl$('pleaseWaitDiv').style.display = 'block';
	pyd_dl$('loaderHaze').style.height = '4000px';
	pyd_dl$('loaderHaze').style.width = '4000px';
	pyd_dl$('loaderHaze').style.opacity = '0.7';
	pyd_dl$('loaderHaze').style.filter = 'alpha(opacity=70)';	
	document.body.style.overflow='hidden';
	document.body.scroll='no';
	if (arguments[0]) {
	pyd_dl$('loaderBlock_part1').innerHTML=arguments[0];
	}
	var loaderDiv = document.getElementById('loaderBlock');
	browserVars.updateVars();
	var lTop = new String(loaderDiv.style.top);
	var x = parseInt(lTop.replace("px","")) + browserVars.scrollTop;
	loaderDiv.style.top = x+"px";
	pyd_dl$('pleaseWaitDiv').style.display = 'block';
	moveLoaderBar();
	if (bDoSHSelect2) { shSelTag('hide'); bDoSHSelect2 = false; }
	return void(0);
}
 
 
			var loaderBarDirection = 0;
			function moveLoaderBar(){
				var leftPos = new String(document.getElementById('loaderBarImage').style.left);
				leftPos.replace("px","");
				leftPos = parseInt(leftPos);
				if(loaderBarDirection==0){
					leftPos = leftPos + 10;
					if(leftPos>310) loaderBarDirection = 1;
				}else{
					leftPos = leftPos - 10;
					if(leftPos==0) loaderBarDirection = 0;
				}
				document.getElementById('loaderBarImage').style.left = leftPos+'px';
				setTimeout("moveLoaderBar()",50);
				return void(0);
			}
 
// Hide all select element in the page for WaitingGif
function shSelTag(act) {
	var sStyle = 'block';
	var i=0;
	var aElms = '';
		if (act == 'show' || act == 'all') { sStyle = 'block'; bDoSHSelect = false; } 
		else { sStyle = 'none'; bDoSHSelect = true; }
		
		aElms = document.getElementsByTagName('select');
		
		//alert('there are currently: '+aElms.length+'to be hidden');
		 
		for (i=0; i < aElms.length; i=i+1) {
			try {
				aElms[i].style.display = sStyle;
				//alert('changed '+i+' '+aElms[i].name+' you asked me to '+act+' all elements.');
			} catch(err) {
				// do nothing about this error, just continue processing 
				// alert('Not changed '+i+' '+aElms[i]+' you asked me to '+act+' all elements.');
			}			
		 }
	return void(0);	
}
 
</script>
				
 
 
</head>
<body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onBeforeUnload="show_loadmsg();">
<table width="100%" cellpadding="0" cellspacing="0" border="0" id="Focus">
<tr>
	<td> my content</td>
</tr>
</table>
 
 
<div id="pleaseWaitDiv" style="display:none;" >
 
	<div id="loaderHaze" style="position:absolute;top:0px;left:0px;background-color:#FF0000;">
		&nbsp;
	</div>
	<div id="loaderBlock" style="width:410px;height:103px;background-image:url(img/loaderBackground.gif);background-repeat:no-repeat;position:absolute;top:200px;left:36%;">
		<div id="loaderBlock_part1" style="position:absolute;top:15px;left:0px;text-align:center;width:410px;">
			Please be patient
		</div>
		<div style="width:374px;height:17px;position:absolute;top:44px;left:16px;">
			<img id="loaderBarImage" style="position:absolute;top:0px;left:0px;" alt="" src="img/loader.gif" />
		</div>
 
		<div id="loaderBlock_part2" style="position:absolute;top:75px;left:0px;text-align:center;width:410px;">
			The system is currently busy retrieving the data.
		</div>
	</div>
 
</div>
 
 
 
 
</body>
</html>
 
 

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LVL 75

Expert Comment

by:Michel Plungjan
ID: 24382127
Had to add some things, but still not sure what your issue is

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html lang="en">
<head>
        
                <script type="text/javascript" language="javascript">
                // initialising the var for WaitingGif function 
var bDoSHSelect = false;
var bDoSHSelect2 = true;
function pyd_dl$(id) {
  return document.getElementById(id) || null;
} 
 
var browserVars = new Object();
browserVars.updateVars=function() {
  this.scrollTop=100;
  alert('hey')
}
function setup_box(id){
        id='pleaseWaitDiv';
        if (document.getElementById('pleaseWaitDiv') != null) {document.getElementById(id).style.display = 'none';}
// hide select object in the page
        if (bDoSHSelect) { shSelTag('show'); }
        document.body.scroll='yes';
}
 
// display the waiting gif
function show_loadmsg(){
        pyd_dl$('pleaseWaitDiv').style.display = 'block';
        pyd_dl$('loaderHaze').style.height = '4000px';
        pyd_dl$('loaderHaze').style.width = '4000px';
        pyd_dl$('loaderHaze').style.opacity = '0.7';
        pyd_dl$('loaderHaze').style.filter = 'alpha(opacity=70)';       
        document.body.style.overflow='hidden';
        document.body.scroll='no';
        if (arguments[0]) {
        pyd_dl$('loaderBlock_part1').innerHTML=arguments[0];
        }
        var loaderDiv = document.getElementById('loaderBlock');
        browserVars.updateVars();
        var lTop = new String(loaderDiv.style.top);
        var x = parseInt(lTop.replace("px","")) + browserVars.scrollTop;
        loaderDiv.style.top = x+"px";
        pyd_dl$('pleaseWaitDiv').style.display = 'block';
        moveLoaderBar();
        if (bDoSHSelect2) { shSelTag('hide'); bDoSHSelect2 = false; }
        return void(0);
}
 
 
                        var loaderBarDirection = 0;
                        function moveLoaderBar(){
                                var leftPos = new String(document.getElementById('loaderBarImage').style.left);
                                leftPos.replace("px","");
                                leftPos = parseInt(leftPos);
                                if(loaderBarDirection==0){
                                        leftPos = leftPos + 10;
                                        if(leftPos>310) loaderBarDirection = 1;
                                }else{
                                        leftPos = leftPos - 10;
                                        if(leftPos==0) loaderBarDirection = 0;
                                }
                                document.getElementById('loaderBarImage').style.left = leftPos+'px';
                                setTimeout("moveLoaderBar()",50);
                                return void(0);
                        }
 
// Hide all select element in the page for WaitingGif
function shSelTag(act) {
        var sStyle = 'block';
        var i=0;
        var aElms = '';
                if (act == 'show' || act == 'all') { sStyle = 'block'; bDoSHSelect = false; } 
                else { sStyle = 'none'; bDoSHSelect = true; }
                
                aElms = document.getElementsByTagName('select');
                
                //alert('there are currently: '+aElms.length+'to be hidden');
                 
                for (i=0; i < aElms.length; i=i+1) {
                        try {
                                aElms[i].style.display = sStyle;
                                //alert('changed '+i+' '+aElms[i].name+' you asked me to '+act+' all elements.');
                        } catch(err) {
                                // do nothing about this error, just continue processing 
                                // alert('Not changed '+i+' '+aElms[i]+' you asked me to '+act+' all elements.');
                        }                       
                 }
        return void(0); 
}
 
</script>
                                
 
 
</head>
<body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onBeforeUnload="show_loadmsg();">
<table width="100%" cellpadding="0" cellspacing="0" border="0" id="Focus">
<tr>
        <td> my content</td>
</tr>
</table>
 
 
<div id="pleaseWaitDiv" style="display:none;" >
 
        <div id="loaderHaze" style="position:absolute;top:0px;left:0px;background-color:#FF0000;">
                 
        </div>
        <div id="loaderBlock" style="width:410px;height:103px;background-image:url(img/loaderBackground.gif);background-repeat:no-repeat;position:absolute;top:200px;left:36%;">
                <div id="loaderBlock_part1" style="position:absolute;top:15px;left:0px;text-align:center;width:410px;">
                        Please be patient
                </div>
                <div style="width:374px;height:17px;position:absolute;top:44px;left:16px;">
                        <img id="loaderBarImage" style="position:absolute;top:0px;left:0px;" alt="" src="img/loader.gif" />
                </div>
 
                <div id="loaderBlock_part2" style="position:absolute;top:75px;left:0px;text-align:center;width:410px;">
                        The system is currently busy retrieving the data.
                </div>
        </div>
 
</div>
 
 
 
 
</body>
</html>
 
 

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Author Comment

by:boodyguard
ID: 24382757
Thanks for your help mplungian , what I don't understood is that the same source code work with onbeforeunload but not onunload on IE.

And both are working on FF ... I start to be crazzy with this source code.

I think the only solution I have ... is to find a other code for my waiting gif ...
0
 
LVL 75

Accepted Solution

by:
Michel Plungjan earned 125 total points
ID: 24382828
But onUnload you cannot expect the document and its content/javascript vars to be there.
onBeforeUnload you CAN
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