How to solve the problem that JavaScript cannot use XPath Functions

When using JavaScript to operate XML objects, we often use XPath to find the XML nodes to be operated on. However, sometimes "unknown method" appears after the selectnodes/selectsinglenode method is called ." If you are sure that the method name is correctly spelled and in the W3C-defined method list (http://www.w3.org/TR/xpath#section-Node-Set-Functions), try the following to solve the problem:
That is, we usually create XML objects Code, Add Xmldomobj. setproperty ("selectionlanguage", "XPath ");

Sample Code:
VaR xmldomobj = new activexobject ("Microsoft. xmldom ");
Xmldomobj. async = false;
Xmldomobj. setproperty ("selectionlanguage", "XPath ");
Xmldomobj. loadxml (xmlstr );
.....
.....

Cause analysis:
In this case, the method for creating an XML version object is to use new activexobject ("Microsoft. xmldom");, The default attribute selectionlanguage is a regular expression, not an XPATH language. Therefore, you only need to set properties to solve this problem.