Web Development

function checkForm()
{
    var frm = document.getElementById('form1');
    var strError = 'The following fields are required:\n';
    var bValid = true;
    var child;
    
    for(var i = 0; i < frm.childNodes.length; i++)
    {
        child = frm.childNodes.item(i);
        if(child.nodeType == 1)
        {
            if(child.tagName.toString().toLowerCase() == 'input')
            {
                if(child.type.toString().toLowerCase() == 'text')
                {
                    if(child.value == '')
                    {
                        strError += '\n'+ child.id.toString();
                        bValid = false;
                    }
                }
            }
        }
    }
    if(!bValid)
        alert(strError);
    return bValid;
}

var objConn = new ActiveXObject('ADODB.Connection');
var objRs = new ActiveXObject('ADODB.Recordset');

objConn.Open(conn_string);
objRs.Open('SELECT * FROM table', objConn, 2, 3);

if(!objRs.BOF) 
{
    objRs.MoveFirst();
    while(!objRs.EOF)
    {
        document.writeln(objRs.Fields("title").Value +'<br/>\n');
        objRs.MoveNext();
    }
}

it will only work in IE

var filePath = 'c:\\test.txt';

if (navigator.userAgent.indexOf('MSIE') == -1 && Components)
{
    try 
    { 
        netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');

        var file = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
        file.initWithPath(filePath);
        if (file.exists()) 
        {
            alert('Found!');
        }
        else
        {
            alert('Not found!');
        }
    }
    catch(e)
    {
        alert(e);
    }
}
else
{   
    try
    {
        var objA = new ActiveXObject('Scripting.FileSystemObject');
        if(objA.FileExists(filePath))
        {
            alert('Found!');
        }
        else
        {
            alert('Not found!');
        }
    }
    
    catch(e)
    {
        alert(e.message);
    }
}

<img src="/images/MyImage.jpg" id="myImg" />

var imgEle = document.getElementById('myImg');
imgEle.onerror = imgError;
 
function imgError()
{
    imgEle.style.display = 'none';
}