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function array_combine (keys, values) {
    // Creates an array by using the elements of the first parameter as keys and the elements of the second as the corresponding values  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/array_combine    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: array_combine([0,1,2], ['kevin','van','zonneveld']);
    // *     returns 1: {0: 'kevin', 1: 'van', 2: 'zonneveld'}
       var new_array = {}, keycount = keys && keys.length, i = 0;
 
    // input sanitation
    if (typeof keys !== 'object' || typeof values !== 'object' || // Only accept arrays or array-like objects
        typeof keycount !== 'number' || typeof values.length !== 'number' ||        !keycount){ // Require arrays to have a count
        return false;
    }
 
    // number of elements does not match    if (keycount != values.length){
        return false;
    }
 
    for ( i=0; i < keycount; i++ ){        new_array[keys[i]] = values[i];
    }
 
    return new_array;
}

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array_combine([0,1,2], ['kevin','van','zonneveld']);

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{0: 'kevin', 1: 'van', 2: 'zonneveld'}