I've a script using navigator's local storage valuesand i've developped a web service that sends me the values, the only issue here is that i dont need it to send me Null results, this is the Function:

```
 function SendNeedHelpLinkTrace() {

    var pLinkVirement = sessionStorage.getItem("pClickVirement");
    var pLinkCarteBancaire = sessionStorage.getItem("pLinkCarteBancaire");
    var pLinkRechargePaiementFactureTelecom = sessionStorage.getItem("pLinkRechargePaiementFactureTelecom");
    var pPaiementVignetteImpotTaxe = sessionStorage.getItem("PaiementVignetteImpotTaxe");
    var pLinkPaiementFactureEauElectricite = sessionStorage.getItem("pPaiementFactureEauElectricite");
    var pLinkServiceFatourati = sessionStorage.getItem("pCatchLinkServiceFatourati");
    var pLinkCihExpress = sessionStorage.getItem("pCatchLinkCihExpress");
    var pLinkEdocuments = sessionStorage.getItem("pCatchLinkEdocuments");

    var lChannelId = "01";
    var lServiceId = "900120";
    var lClientId = document.getElementById('<%= HiddenClientId.ClientID%>').value;

    alert(lClientId);
    var lData;
    var lCollect;

    console.log(lClientId);

        lData = pLinkVirement + " | " + pLinkCarteBancaire + " | " + pLinkRechargePaiementFactureTelecom + " | " + pPaiementVignetteImpotTaxe + " | " + pLinkPaiementFactureEauElectricite + " | " + pLinkServiceFatourati + " | " + pLinkCihExpress + " | " + pLinkEdocuments;

        console.log(lData);

        alert(lData);

        lDataCollected = lClientId + ";" + lChannelId + ";" + lServiceId + ";" + lData;

        console.log(lDataCollected);

        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "http://localhost:9097/CatchEvent.asmx/CollectData",
            data: JSON.stringify({ "pData": lDataCollected }),
            dataType: "json",
            async: true,
            success: function (data, textStatus) {
                if (textStatus == "success") {
                    alert('success');
                }
            },
            error: function (exception) {
                alert('Exeption : ' + exception);
            }
        });
        sessionStorage.clear();

    }

```

the results are like this :

Null || 300123 || 900452 || Null || Null || 26332 

what should i do to not show the Null results ?