将ASPajax转换为jquery.ajax

I trying to convert a ASPajax function to jquery.ajax but without any success.

getChapterTit = function(tag){
        ASPajax.LiveASP('getChapterTit("'+tag+'")' , titCallback )
    }

the php function is

getChapterTit($variable) 

and returns a value from a table.

I have no clue to to transform this ASP function into a proper jqyery.

Thank you any pointers help.