How to twrminate a function

I AM CALLING A FUNCTION THAT CALLS A FUNCTION TO VALIDATES FOR A CONDITION

AND I WANT TO CERTAIN THINGS TO DO ONLY IF THE VALIDATION IS TRUE


MY PROBLEM IS I CAN WRITE THE CONDITION BUT I AM NOT SURE OF 'CLOSING THE FUNCTION;

EXAMPLE

GIVEN BELOW IS MAIN FUNCTION

function doAddContinue()
{
if ( verifyentry(addcntr) ) // CALLING verifyentry FUNCTION
{
alert(" True condition ");
}
else
{ break; }
// IF I CHOOSE TO WRITE THIS WAY IS IT CORRECT ?

add2Table();
// WANT TO CALL ONLY IF THE verifyentry RETURNS TRUE
}


FOLLOWING FUNCTION IS CALLED
function verifyentry(cntr)
{
var vline=true;
if (document.f1.line_size_dummy.value == "select from list")
{
alert("Incomplete information ...please select the Line");
document.f1.line_size_dummy.focus();
return false;
break;

}

I WANT TO ASK
1. IS IT NECESSARY TO HAVE
return false;
break;

THESE 2 SENTENSES ?


THANKS IN ADVANCE

keep the break in the doaddcontinue function and only use return false in the second function.