when call the webservice using jquery every time it shown er

Question

when call the webservice using jquery every time it shown error with googlecrome
what is the problem.


 var param = 'firstname=' + firstname+ '&dob=' + dob + '&mobileno=' + mobileno 
$.ajax({                 type: "POST",                 url: "MyWebService.asmx/SayHello",                 data:param , 

                //contentType: "application/x-www-form-urlencoded; charset=UTF-8", // if you are using form encoding, this is default so you don't need to supply it                 dataType: "text", // the data type we want back, so text.  The data will come wrapped in xml                 success: function (data) {                     $("#searchresultsA").html(data); // show the string that was returned, this will be the data inside the xml wrapper                 }

                  error:function(a,b,c)
{
         
}             });