Manual validation with asp.net validation controls

You all know that asp.net validation controls are automatically validated when you set property CausesValidation=true for a button. But sometimes we will be required to do manually/explicitly. I came across with this situation. That is, on button click I need to execute some JavaScript code if all validations are passed. The problem here is both validations and JavaScript code will not get executed same time. In this case what I did is, I set CausesValidation=false for a button and added the following JavaScript code to do manual validation.

function checkValidations() {

     var rtnVal = true;

     for (i = 0; i < Page_Validators.length; i++) {

         ValidatorValidate(Page_Validators[i]);

         if (!Page_Validators[i].isvalid) { //at least one is not valid.

             rtnVal = false;

             break; //exit for-loop, we are done.

         }

     }

     return rtnVal;

}

If it is passed then I am executing required JavaScript code else not.

<asp:Button ID="btnSubmit" runat="server" OnClientClick="return doSomeThing()" OnClick="btnSubmit_Click" Text="Submit">

</asp:Button>

function doSomeThing()

        {

            if(checkValidations())

            {

                //perform something

                return true;

            }

            else

                return false;

        }