function Enquiry()
{
    if(IsEmptyText('ctl00_ISAContent_txtFirstName'))
    {
        alert('Please enter your first name');
        return false;
    }
    
    if(IsEmptyText('ctl00_ISAContent_txtLastName'))
    {
        alert('Please enter your last name');
        return false;
    }
    
    if(IsEmptyText('ctl00_ISAContent_txtPhone'))
    {
        alert('Please enter your phone number');
        return false;
    }
    
    if(!IsEmailText('ctl00_ISAContent_txtEmail'))
    {
        alert('Please enter your Email');
        return false;
    }
    
    return true;
}

function Search()
{
    
    if(IsEmptyText('ctl00_txtSearch'))
    {
        alert('Please enter any search term');
        return false;
    }
    
    return true;
}

function EmailThis() 
{
    if (IsEmptyText('txtYourName')) 
    {
        alert('Please enter your name');
        return false;
    }

    if (!IsEmailText('txtYourEmail')) 
    {
        alert('Please enter your email');
        return false;
    }

    if (!IsEmailText('txtFriendEmail')) 
    {
        alert("Please enter friend's email address");
        return false;
    }

    return true;
}