David,

thank you very much for this simple idea.
However, it seems that data bound control is not refreshed after data change.
The following sample code still shows A in input field.
It it possible that input field shows a letter B ?

< xml id=DocHead javaDSOCompatible="true">
< DocHead>< row>< oper>A< /oper>< /row>< /DocHead>
</xml>
< script>
DocHead.innerHTML='< DocHead>< row>< oper>B< /oper>< /row>< /DocHead>';
< /SCRIPT>
< input datasrc=#DocHead datafld=oper>

>
>Your syntax does not work, because the data island is not really a DOM object with a LoadXML method. Try this (remove extra spaces):
>

>< script>
>DocHead.innerHTML='< row>< oper>B< /oper>< /row>'
>< /script>
>

>Note that to match your original sample, you need to also add the < DocHead> and < /DocHead> at the beginning and end of the above string.
>
>>I need to change value of XML data island to other XML string dynamically.
>>However, the following program produces an error
>>Object doesn't support this property or method.
>>

>>< xml id=DocHead javaDSOCompatible="true">
>>< DocHead>< row>< oper>A< /oper>< /row>< /DocHead>
>>< /xml>
>>
>>< script>
>>DocHead.LoadXML( '< row>< oper>B< /oper>< /row>');
>>< /script>
>>