function jwdChangeFormAction(str)
{
    var arr = new Array();
    arr[0] = 'web';
    arr[1] = 'img';
    arr[2] = 'mov';

    for (i = 0; i < arr.length; i++) {
        if (arr[i] == str) {
            document.getElementById(arr[i] + '_txt').className = arr[i]+'_active';
        } else {
            document.getElementById(arr[i] + '_txt').className = arr[i]+'_normal';
        }
    }

    if (str == 'img') {
        document.getElementById('act').name  = 'act';
        document.getElementById('act').value = 'image';	
    }else if (str == 'mov') {
        document.getElementById('act').name  = 'act';
        document.getElementById('act').value = 'movie';
    } else {
        document.getElementById('act').name  = 'act';
        document.getElementById('act').value = '';
    }
}