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我在尝试更新一个基于某些Ajax代码来控制滚动脚本的Javascript变量。当Ajax脚本中的条件为真时，Ajax代码应该添加到JS Var中。有什么办法可以触发这个吗？是否可以从Ajax响应中更改Javascript变量？
谢谢！
编辑：我不确定如何更改变量的值。我试着通过Ajax来改变它，但它不会被解析。我也尝试使用JS内部的PHP来检查一个条件，但这样做只能工作一次。
JS代码
function speedUp()
{
actualheight = actualheight + 50;
}
function slowDown()
{
actualheight = actualheight - 50;
}
function ajaxFunction()
{
var xmlhttp = createRequestObject();
xmlhttp.onreadystatechange=function()
{
if(xmlhttp.readyState==4)
{
document.getElementById('iemarquee').innerHTML=xmlhttp.responseText;
document.getElementById('iemarquee2').innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","saleCallTest.php",true);
xmlhttp.send(null);
}
/*
Cross browser Marquee II- © Dynamic Drive (www.dynamicdrive.com)
For full source code, 100's more DHTML scripts, and TOS, visit http://www.dynamicdrive.com
Modified by jscheuer1 for continuous content. Credit MUST stay intact for use
*/
//Specify the marquee's width (in pixels)
var marqueewidth="500px"
//Specify the marquee's height
var marqueeheight="500px"
//Specify the marquee's marquee speed (larger is faster 1-10)
var marqueespeed=1
//Specify initial pause before scrolling in milliseconds
var initPause=1000
//Specify start with Full(1)or Empty(0) Marquee
var full=1
//Pause marquee onMousever (0=no. 1=yes)?
var pauseit=0
//Specify Break characters for IE as the two iterations
//of the marquee, if text, will be too close together in IE
var iebreak='<p></p>'
//Specify the marquee's content
//Keep all content on ONE line, and backslash any single quotations (ie: that\'s great):
var marqueecontent='<?php for($i=0;$i<=count($saleItems);$i++)
{
if ($saleItems[$i]['stateOfItem'] =="Sold" || $saleItems[$i]['stateOfItem'] =="Unsold")
{
$_SESSION['countItems']++;
echo $saleItems[$i]['itemNumber'];
echo $saleItems[$i]['stateOfItem'] . '<br />';
}};
?>'
////NO NEED TO EDIT BELOW THIS LINE////////////
var copyspeed=marqueespeed
var pausespeed=(pauseit==0)? copyspeed: 0
var iedom=document.all||document.getElementById
var actualheight=''
var cross_marquee, cross_marquee2, ns_marquee
function populate(){
if (iedom){
var lb=document.getElementById&&!document.all? '' : iebreak
cross_marquee=document.getElementById? document.getElementById("iemarquee") : document.all.iemarquee
cross_marquee2=document.getElementById? document.getElementById("iemarquee2") : document.all.iemarquee2
cross_marquee.style.top=(full==1)? '8px' : parseInt(marqueeheight)+8+"px"
cross_marquee2.innerHTML=cross_marquee.innerHTML=marqueecontent+lb
actualheight=cross_marquee.offsetHeight
cross_marquee2.style.top=(parseInt(cross_marquee.style.top)+actualheight+8)+"px" //indicates following #1
}
else if (document.layers){
ns_marquee=document.ns_marquee.document.ns_marquee2
ns_marquee.top=parseInt(marqueeheight)+8
ns_marquee.document.write(marqueecontent)
ns_marquee.document.close()
actualheight=ns_marquee.document.height
}
setTimeout('lefttime=setInterval("scrollmarquee()",20)',initPause)
}
window.onload=populate
function scrollmarquee(){
if (iedom){
if (parseInt(cross_marquee.style.top)<(actualheight*(-1)+8))
cross_marquee.style.top=(parseInt(cross_marquee2.style.top)+actualheight+8)+"px"
if (parseInt(cross_marquee2.style.top)<(actualheight*(-1)+8))
cross_marquee2.style.top=(parseInt(cross_marquee.style.top)+actualheight+8)+"px"
cross_marquee2.style.top=parseInt(cross_marquee2.style.top)-copyspeed+"px"
cross_marquee.style.top=parseInt(cross_marquee.style.top)-copyspeed+"px"
}
else if (document.layers){
if (ns_marquee.top>(actualheight*(-1)+8))
ns_marquee.top-=copyspeed
else
ns_marquee.top=parseInt(marqueeheight)+8
}
}
if (iedom||document.layers){
with (document){
if (iedom){
write('<div style="position:relative;width:'+marqueewidth+';height:'+marqueeheight+';overflow:hidden" onMouseover="copyspeed=pausespeed" onMouseout="copyspeed=marqueespeed">')
write('<div id="iemarquee" style="position:absolute;left:0px;top:0px;width:100%;background:black;color:white;font-size:30pt;">')
write('</div><div id="iemarquee2" style="position:absolute;left:0px;top:0px;width:100%;z-index:100;background:black;color:white;font-size:30pt;">')
write('</div></div>')
}
else if (document.layers){
write('<ilayer width='+marqueewidth+' height='+marqueeheight+' name="ns_marquee">')
write('<layer name="ns_marquee2" width='+marqueewidth+' height='+marqueeheight+' left=0 top=0 onMouseover="copyspeed=pausespeed" onMouseout="copyspeed=marqueespeed"></layer>')
write('</ilayer>')
}
}
}
</script>
AJAX-> PHP CODE
<?php
session_start();
//NuSoap Library
require_once('./lib/nusoap.php');
$_SESSION['countTotal'] = 0;
//Creating a Client
$client = new nusoap_client('http://xx.xx.x.xxx:xxxx/WSSERVICE/services/SERVICE?WSDL');
$saleItems= $client->call("getItems", array("Sale" => '001'));
$_SESSION['countNew'] = 0;
$countPresale = count($saleItems);
$timer = $countPresale * 3.15;
for($i=0;$i<=count($saleItems);$i++)
{
if ($saleItems[$i]['stateOfItem'] =="Sold" || $saleItems[$i]['stateOfItem'] =="Unsold")
{
$_SESSION['countNew']++;
echo $saleItems[$i]['itemNumber'];
echo $saleItems[$i]['stateOfItem'] . '<br />';
}};
if($_SESSION['countNew'] < $_SESSION['countVehicles'])
{
$_SESSION['countTotal']--;
}
if($_SESSION['countNew'] > $_SESSION['countVehicles'])
{
$_SESSION['countTotal']++;
}
if($_SESSION['countTotal'] < 0)
{
$opx = 3 * ($_SESSION['countItems'] - $_SESSION['countNew']);
echo 'actualheight = parseInt(actualheight) + parseInt(' . $opx . ');';
$_SESSION['countVehicles'] = $_SESSION['countNew'];
}
if($_SESSION['countTotal'] > 0)
{
$opx = 3 * ($_SESSION['countItems'] + ($_SESSION['countNew'] - $_SESSION['countNew']));
echo 'actualheight = parseInt(actualheight) - parseInt(' . $opx . ');';
$_SESSION['countItems'] = $_SESSION['countNew'];
}
?>
也许您有范围问题？您的处理程序是否无法“找到”要更新的变量？ – Upperstage 2009-12-07 19:20:23