Abap code in HTML Tag in Web Interface

Question

Hello,
in a text tag im my web interface for a BPS a added the sap example code "How to Integrate BEx Web Applications into BPS Web Interfaces".
Now I want to open a web template with a query containing the user and the date as filter object. this filter i want to fill already while creating the url.
I inserted a command like <%sy-uname%>  but it doesn't get the users name. Do I miss a command to make abap available in this context, or do i have to use javascript. -> can someone give me a tip where i can find the javascript functions ?
I add the coding below.
Thanks for your help.
Dieter
<iframe id="BWReport03" name="BWQUERY" src="/sap/bw/mime/bex/icons/pixel.gif" width="1000" height="700"></iframe>
<script language="JavaScript" type="text/javascript">
function varValueConvert(dispValue){
/* Expected formatting of variable selector: Text(Key) or Key
   If there are more than one (...) expression the first is taken.
  var keySection = dispValue.match(/(.*?)/);
  if (keySection){
    var keyValue = keySection[0].replace(/(|)/g,"");
    alert(dispValue + ' : ' + keySection + " : " +keyValue);
     return keyValue;
   } else {//alert(dispValue);
    return dispValue;
var frame = document.getElementById( 'BWReport03' );
var url = '/sap/bw/BEx?cmd=ldoc&TEMPLATE_ID=';
var filter1 = '&FILTER_IOBJNM_1=ZIPBTCUSR&FILTER_COLLAPS_1=&FILTER_VALUE_EXT_1=';
var filter2 = '&FILTER_IOBJNM_2=0CALDAY&FILTER_COLLAPS_2=';
var filter2low  = '&FILTER_VALUE_LOW_EXT_2=';
var filter2high = '&FILTER_VALUE_HIGH_EXT_2=';
var appl = 'WZIPBTCLOG_S_LOG001';
var varvl1 =<b> '<%=sy-uname%>';</b>
var varvl2 = <b>'<%=sy-datum%>';</b>
var varvl3 = <b>'<%=sy-datum - 7%>';</b>
// create URL
url = url + appl + filter1 + varvl1 + filter2 + filter2low + varvl2 + filter2high + varvl3;
// remove possible white spaces
url = url.replace(/ /,"");
// set source attribute of iframe to new URL
frame.src = url;
</script>

Answer 1

Hi,
There's a disjoin here when we write the java script it's run at the front end and cannot read any standard SAP variables(unless you code for some kind of rfc call not sure). It can only read what's displayed on the web page. If you can somehow display the user id on the web page you will be able to read it back in the script. Regarding date that's a standard functionality in script
please refer
<a href="http://www.w3schools.com/js/js_obj_date.asp">Java script</a>
hope this was helpful.
thanks