How to show a Prelaoder/Loading animation/gif/percentage while the included PHP page processes/loads?
I'm including a PHP script with in a main PHP page.
Help me "how to show a Preloader/loading animation or gif or swf or simply percentage of loading while the included PHP script processes & loads?" Here is the code snippet where I want to show the same (See the last line of code):
<body onLoad="document.forms.form1.from.focus()">
<font face="Calibri">
<table cellpadding="10">
<form action="<?=$_SE开发者_JAVA百科RVER['PHP_SELF']?>" method="post" name="form1">
<tr>
<td width='25%'>
<fieldset>
<legend>Enter From & To Date</legend>
<table border='0'>
<tr>
<td>From </td>
<td><input type="text" name="from" /></td>
</tr>
</fieldset>
<input type="submit" name="submit" value="Submit" />
</td>
</tr>
</form>
</table>
<?
//Form submitted
if(isset($_POST['submit']))
{
//No errors, process
if(!@is_array($error))
{
HERE IS WHERE I WANT THE LOADING TO TAKE PLACE
//HERE I INCLUDE THE SCRIPT
Also, if i can delay the display of the PHP script until it completes processing.
Put a <div> containing your loading screen right after the <body> (or at least before the time-consuming loading happens). At the very end (or after the long part which should be covered by the loading screen) add some JavaScript to hide/remove the div containing the loading screen.
This is my modified version of a script I got off the internet. Cant remember where I got it from sorry.
<html>
<head>
<script type="text/javascript">
function swapdiv() {
//Hide the loading div
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('loadingdiv').style.display = 'none';
} else {
if (document.layers) { // Netscape 4
document.loadingdiv.display = 'none';
} else { // IE 4
document.all.loadingdiv.style.display = 'none';
}
}
//Show the results div
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('resultdiv').style.display = 'block';
} else {
if (document.layers) { // Netscape 4
document.resultdiv.display = 'block';
} else { // IE 4
document.all.resultdiv.style.display = 'block';
}
}
window.onunload = null;
return;
}
</script>
</head>
<body>
<form name="form1">
</form>
<div id='loadingdiv' align='center'><img src='../images/loading.gif' alt='Loading...' title='Loading...' /></div>
<div id='resultdiv' style='display:none;'>
<!-- Do some html stuff here. This div block is hidden until the end of page load -->
<?php
//Query database
//Show results
?>
</div>
<script type='text/javascript'>
//this is called after page loaded
window.onload=swapdiv;
</script>
</body>
</html>
加载中,请稍侯......
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