</fieldset>
        </center>

    <!--/form-->
</div>

c_ady = document.getElementById('c_ady').value;
c_op = document.getElementById('c_op').value;
co = document.getElementById('co').value;
hip = document.getElementById('hip').value;

if (c_ady== "" || c_op== "" || co== "" || hip== ""){
    alert ("achu, los datos son obligatorios achu!");
    return false;