vetor de colisão

<script>
var line = prompt("Informe o Numero de linhas: ");
var column = prompt("Informe o Numero de colunas: ");
var table = [];

for(var i = 0; i < line; i++){
    var table_line = [];
    for(var j = 0; j < column; j++){
        var val = prompt("Informe o valor para ["+i+"]["+j+"]");
        table_line.push(val);
    }
    table.push(table_line);
}

var str = '';
for(var i = 0; i < line; i++){
    for(var j = 0; j < column; j++){
        str += table[i][j];
    }
    str += '\n';
}
alert("Tabela\n" + str);

var dif = [];

for(var i = 0; i < table.length; i++){
    var jdx = [];

    for(var j = 0; j < table[i].length; j++){
        if(table[i][j] == 1)
            jdx.push(j);
    }

    for(var z = 1; z < jdx.length; z++){
        dif.push(jdx[z] - jdx[z-1]);
    }
}

var vcs = [];

loop:{
    for(var i = 0; i < dif.length; i++){
        var dec = Math.pow(2, (dif[i]-1));

        if(vcs.length == 0)
            vcs.push(dec);
        else {
            for(var j = 0; j < vcs.length; j++){
                if(dec == vcs[j])
                    break loop;
            }
            vcs.push(dec);
        }
    }
}

var dec = 0;
for(var i = 0; i < vcs.length; i++){
    dec += vcs[i];
}

dec = parseInt(dec, 10).toString(2);

while(dec.length < 8){
    dec = '0' + dec;
}

for(var i = 0; i < table.length; i++){
    table[i];
}

alert("Vetor de colisao: " + dec);

</script>