function IsSignThematicMailing(checbox)
{
    if(checbox.checked)
    {
        document.getElementById("divSignThematicMailing").style.display = "block";
    }
    else
    {
        document.getElementById("divSignThematicMailing").style.display = "none";
    }
}
function ClearErrMsg(obj)
{
    var email = document.getElementById("_ctl0_ContentPlaceHolder1_Txtemail");
    var phonenumber = document.getElementById("_ctl0_ContentPlaceHolder1_Txtphonenumber");
    
    if(email.value=="" && phonenumber.value=="")
        document.getElementById("_ctl0_ContentPlaceHolder1_lblError").style.display="block";
    else
        document.getElementById("_ctl0_ContentPlaceHolder1_lblError").style.display="none";
}
function CheckIfValid()
{
    var email = document.getElementById("_ctl0_ContentPlaceHolder1_Txtemail");
    var phonenumber = document.getElementById("_ctl0_ContentPlaceHolder1_Txtphonenumber");
    
    if(email.value=="" && phonenumber.value=="")
    {
        document.getElementById("_ctl0_ContentPlaceHolder1_lblError").style.display="block";
        window.scrollTo(0, 0); 
        
        return false;
    }
    else
    {
        document.getElementById("_ctl0_ContentPlaceHolder1_lblError").style.display="none";
        return true;
    }
}