在查询页面中显示进度条，在数据load成功后隐去进度条 选择自 chensheng913 的 Blog

<script language="javascript">
function onSubmit() {
var waitingInfo = document．getElementById(getNetuiTagName("waitingInfo"));
waitingInfo.style.display = ""; //show the ProgressBar
progress_update(); //begin the progressbar
//waiting for several seconds,you would delete in your case
for(i=0;i<1000000;i++){
j=i+i;
}
location.href="progressbar.jsp"; //config your action page in here
}

// Build the netui_names table to map the tagId attributes
// to the real id written into the HTML
if (netui_names == null)
var netui_names = new Object();
netui_names.selectButton="portlet_15_1selectButton"
// method which will return a real id for a tagId
function getNetuiTagName(id) {
return netui_names[id];
}

// method which will return a real id for a tagId,
// the tag parameter will be used to find the scopeId for
// containers that may scope their ids
function getNetuiTagName(id, tag) {
var scopeId = getScopeId(tag);
if (scopeId == "")
return netui_names[id];
else
return netui_names[scopeId + "__" + id];
}

// method which get a tag will find any scopeId that,
// was inserted by the containers
function getScopeId(tag) {
if (tag == null)
return "";
if (tag.getAttribute) {
if (tag.getAttribute('scopeId') != null)
return tag.getAttribute('scopeId');
}
if (tag.scopeId != null)
return tag.scopeId;
return getScopeId(tag.parentNode);
}

// Build the netui_names table to map the tagId attributes
// to the real id written into the HTML
if (netui_names == null)
var netui_names = new Object();
netui_names.waitingInfo="waitingInfo"

var progressEnd = 15; // set to number of progress <span>'s.
var progressColor = 'green'; // set to progress bar color
var progressInterval = 200; // set to time between updates (milli-seconds)

var progressAt = progressEnd;
var progressTimer;
function progress_clear() {
for (var i = 1; i <= progressEnd; i++)
document．getElementById('progress'+i).style.backgroundColor = 'transparent';
progressAt = 0;
}
function progress_update() {
progressAt++;
if (progressAt > progressEnd) progress_clear();
else document．getElementById('progress'+progressAt).style.backgroundColor = progressColor;
progressTimer = setTimeout('progress_update()',progressInterval);
}
function progress_stop() {
clearTimeout(progressTimer);
progress_clear();
}
</script>

<span id="waitingInfo" style="display:none">
<table align="center"><tr><td>
正在处理数据, 请稍候......
<div style="font-size:2pt;padding:2px;border:solid black 1px">
<span id="progress1"> </span>
<span id="progress2"> </span>
<span id="progress3"> </span>
<span id="progress4"> </span>
<span id="progress5"> </span>
<span id="progress6"> </span>
<span id="progress7"> </span>
<span id="progress8"> </span>
<span id="progress9"> </span>
<span id="progress10"> </span>
<span id="progress11"> </span>
<span id="progress12"> </span>
<span id="progress13"> </span>
<span id="progress14"> </span>
<span id="progress15"> </span>
</div>
</td></tr></table>
</span>

<center>
点击按钮试试：
<input name="button" type="button" value="查询" onClick="javascript： return onSubmit();">
</center>