String.prototype.trim = function () {
    return this.replace(/^\s*/, "").replace(/\s*$/, "");
}

function validateForm()
{
    if(document.getElementById("txtSearchName") != null)
    {
        if (document.getElementById("txtSearchName").value.trim() != "" ||
            document.getElementById("txtSearchEmail").value.trim() != "" ||
            document.getElementById("txtSearchPhone").value.trim() != "" ||
            document.getElementById("ddlSearchDept").value.trim() != "")
            return true;
        else
        {
            alert("Please provide at least one search term.");
            return false;
        }
    }
}