for(var i = 0; i < aButtons.length; ++i){
 aButtons[i].addEventListener('click', eventHandler(this, 'localhost:myport/myservice/..stb/myFun', {
  someId: "data-myImportantValue",
  somOtherId: "data-otherImportantId"
 }));
}

for(var i = 0; i < bButtons.length; ++i){
 bButtons[i].addEventListener('click', eventHandler(this, 'localhost:myport/myservice/..stb/myFun2', {
  someStuff: "akarmi"
 }));
}

function eventHandler(baseUrl, queryParams) {
 var queryString = processParams(queryParams);
 // queryString:
 // &someId=<this.getAttribute("data-myImportantValue")>&someOtherId=<this.getAttribute("data-otherImportantId")>
 window.document.location.href = baseUrl + queryString;
}