javascript - sort array multidimensional ! three level -

i want 3 level sort each asc or desc.

for example:

1st sort age(asc),then nationality(desc),then name(asc) 

this using of works

function sortobjects(objarray, properties) { var primers = arguments[2] || {};  properties = properties.map(function(prop) {     if( !(prop instanceof array) ) {         prop = [prop, 'asc']     }     if( prop[1] == 'desc' ) {         prop[1] = -1;     } else {         prop[1] = 1;     }     return prop; });  function valuecmp(x, y) {     return x > y ? 1 : x < y ? -1 : 0;  }  function arraycmp(a, b) {     var arr1 = [], arr2 = [];     properties.foreach(function(prop) {         var avalue = a[prop[0]],             bvalue = b[prop[0]];         if( typeof primers[prop[0]] != 'undefined' ) {             avalue = primers[prop[0]](avalue);             bvalue = primers[prop[0]](bvalue);         }         arr1.push( prop[1] * valuecmp(avalue, bvalue) );         arr2.push( prop[1] * valuecmp(bvalue, avalue) );     });     return arr1 < arr2 ? -1 : 1; }  objarray.sort(function(a, b) {     return arraycmp(a, b); }); } 

i use this

sortobjects(array,[["age","asc"],["nationality","desc"],["name","asc"]]); 

i want sort nationality[1] doesnt work...how sort first value of array?

sortobjects(array,[["age","asc"],["nationality[1]","desc"],["name","asc"]]); 

how sort first value of array?