function textCounter(field, maxlimit) {
    if (field.value.length > maxlimit)
    {
        field.value = field.value.substring(0, maxlimit);
    }
    else
    {
        //document.getElementById(field.id).value = maxlimit - field.value.length;
    }
} 

function showhide(id){
    if (document.getElementById){
            obj = document.getElementById(id);
        if (obj.style.display == "none"){
            obj.style.display = "";
        } else {
        obj.style.display = "none";
        }            
    }
}

function isNumberKey(evt)
{
    var charCode = (evt.which) ? evt.which : event.keyCode
    if (charCode > 31 && (charCode < 48 || charCode > 57))
        return false;
    return true;
}