I like to do the following: When a selection in a select box changes,
display a value from a mapped property in a textarea field. To do this I
need to get the currently selected value of the ComboBox by calling some
javascript function in the onchange event of SELECT.
This is my JSP code:
<html:form action="/startReportWizard" focus="reportKind">
<table border="0" width="500" align="center">
<TR>
<TD width=250><bean:message key="GenerateReportPage1.Selection" />
<TD width=*>
<html:select property="reportKind"
onchange="displayReportDescription()"> <html:optionsCollection
name="reportDescriptions" value="value.report_ID"
label="value.report_Name"/>
</html:select>
</TD>
</TR>
<TR>
<TD><bean:message key="GenerateReportPage1.Description" /></TD>
<TD>
<html:textarea property="reportDescription" rows="3"
disabled="false"/></TD>
</TR>
....
The javascript function displayReportDescription() returns the currently
selected value of the ComboBox (Select list)
In the form bean I have a Hashtable as follows:
private Hashtable<String, ReportDescription> availableReports;
public synchronized Hashtable<String, ReportDescription>
getAvailableReports()
{
return availableReports;
}
public synchronized void setAvailableReports(
Hashtable<String, ReportDescription> availableReports)
{
this.availableReports = availableReports;
}
public ReportDescription getValue(String key)
{
return availableReports.get(key);
}
With these getters I should be able to do the following in my JSP to
retrieve a specific value from my Hashtable:
<html:textarea property="value(name)"/>
where name is the VALUE of the currently selected Item of the Select box.
So inside my javascript function I should do something like:
function displayReportDescription()
{
var ComboBox=document.forms[0].elements["reportKind"];
var selected = ComboBox.selectedIndex;
var selectedValue = ComboBox.options[selected].value;
document.forms[0].elements["reportDescription"].value = THE VALUE
FROM MY HASHTABLE IN MY FORMBEAN!!
}
The question is how can I call the
getAvailableReports().getValue(selectedValue) of my form bean from
inside the above JavaScript????
Any help would be greatly appreciated.
Tom
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