matrix_transpose.js

function transpose(matrix){
    var n=matrix.length;
    var m=matrix[0].length;
    var result=new Array(m);
    for(var i=0;i<m;i++){
        result[i]=new Array(n);
        for(var j=0;j<n;j++){
            result[i][j]=matrix[j][i];
        }
    }
    return result;
}