Possible Duplicate:
Best way to break from nested loops in Javascript?
Is using labels to break loops, a good practice in javascript? Mention if it has any pros and cons
Ex:
var i, j;
outer:
    for(i in [0,1,2,3]) { 
    inner:
        for(j in [0,1,2,3]) { 
            if(j == 1) { 
                break outer; 
            }
        } 
        console.log("inner")
    } 
console.log("outer");
 
     
    