function changeHeight(ac) {
  if (document.getElementById('main') && document.getElementById('enquiry_width') && document.getElementById('enquiry_width_ts')) {
    n1 = document.getElementById('main');  
    n2 = document.getElementById('enquiry_width');
    n3 = document.getElementById('enquiry_width_ts')    

    if (ac == 1)
      n1.width++;
    else
      n1.width--;
    
    n2.value = n1.width;
    n3.value = n1.width;
  }
}

function getWidth(name, src) {
  if (document.getElementById(name)) {
    document.getElementById(name).src = src;
  }
}