BtnUp = new Image(50,50)
BtnUp.src = "images/arrows/button_up.png"
BtnUp_on = new Image(50,50)
BtnUp_on.src = "images/arrows/button_up_on.png"

BtnDown = new Image(50,50)
BtnDown.src = "images/arrows/button_down.png"
BtnDown_on = new Image(50,50)
BtnDown_on.src = "images/arrows/button_down_on.png"

BtnLeft = new Image(50,50)
BtnLeft.src = "images/arrows/button_left.png"
BtnLeft_on = new Image(50,50)
BtnLeft_on.src = "images/arrows/button_left_on.png"

BtnRight = new Image(50,50)
BtnRight.src = "images/arrows/button_right.png"
BtnRight_on = new Image(50,50)
BtnRight_on.src = "images/arrows/button_right_on.png"

function changeImg(cImg,ref) {
  document.images[cImg].src = ref.src;
}

function twdCount(field,cntfield,maxlimit) {
  if (field.value.length > maxlimit)
    field.value = field.value.substring(0, maxlimit);
  else
    cntfield.value = maxlimit - field.value.length;
}

function BarOn()
{
    document.getElementById("search_bar").style.color = "black";
    document.getElementById("search_bar").value = '';
}


function sel_checkboxes(form) {
  var total=0;
  for (i=0; i<form.length; i++) {
    if (form[i].type == 'checkbox' && form[i].checked) {
      total++;
    }
  }
  if (total>0) {
    form.action[0].disabled=false;
  } else {
    form.action[0].disabled=true;
  }
}