In order to do this, first you need to have a global class and your method should be a webservice method:

global class TestClass {&nbsp; &nbsp; <br> webservice static void testMethod(String testParameter) {<br>&nbsp; &nbsp; &nbsp; &nbsp; ..Do your stuff..<br>&nbsp; &nbsp; }<br>}

and then, you could call your apex method via javascript;

sforce.apex.execute(&nbsp;<br>&nbsp; &nbsp; 'TestClass',<br>&nbsp; &nbsp; 'testMethod',<br>&nbsp; &nbsp; {<br>&nbsp; &nbsp; &nbsp; &nbsp; testParameter : 'VIN'<br>&nbsp; &nbsp; }<br>);

@Hasantha Liyanage Hi this is not firing the class , 

global class SkuidTest{
    webservice static ID createEmployee(String companyName) {
     
      Employment_Experience__c  emp=new Employment_Experience__c();
      emp.Name=‘SKUIDTEST001’;
      emp.Company_Name__c=companyName;
      
      insert emp;
      
      return emp.Id;

    }
}

alert(‘vin check’);var redult=sforce.apex.execute( 
    ‘SkuidTest’,
    ‘createEmployee’,
    {
        companyName : ‘VIN’
    }
    );
  alert(redult);
 
  Is there anything we are missing in the approach

Rajasekhar,

Please refer the link  to the post by Ant Belsham : Calling apex function will explain everything for you

raj- you need to have added external resource for ajax tookit