function getObj(objID)
{
    if (document.getElementById) {return document.getElementById(objID);}
    else if (document.all) {return document.all[objID];}
    else if (document.layers) {return document.layers[objID];}
}

function disableFormSubmit() {
    var forms = document.getElementsByTagName('form');
    for (var i = 0; i < forms.length; i++) {                  
        var input = forms[i].getElementsByTagName('input');
        for (var j = 0; j < input.length; j++) 
        {
            if (input[j].type.toLowerCase() == 'submit') {
                input[j].disabled=true;
            }
        }
    }
    return true;
}    

function enableFormSubmit() {
    var forms = document.getElementsByTagName('form');
    for (var i = 0; i < forms.length; i++) {                  
        var input = forms[i].getElementsByTagName('input');
        for (var j = 0; j < input.length; j++) 
        {
            if (input[j].type.toLowerCase() == 'submit') {
                input[j].disabled=false;
            }
        }
    }
    return true;
}