Question

Is there an xpath way to select a given attribute value?

For example I have an html document and want to select only “?ms=669601” :

<input type="button" value="تفاصيل" onclick="xmlreqGET("?ms=669601","jm1x");">

Answer 1

In your simple example, you could simply select that portion of the onclick attribute in the only input:

substring(input/@onclick, 12, 10)

In more complicated documents, try selecting first by @value (or some other (possibly unique) criteria):

substring(//input[@value='تفاصيل']/@onclick, 12, 10)

Or by targeting the input that contains part of the desired substring:

substring(//input[contains(@onclick, 'xmlreqGET(')]/@onclick, 12, 10)

Selecting the input element itself if its onclick attribute contains the target string:

//input[contains(@onclick, '?ms=669601')]

Note: Your input is not valid XML, due to nested double-quotes.