function validate()
{
isEntered(document.getElementById('name'),'name');
isEntered(document.getElementById('email'),'email');
isEntered(document.getElementById('phone'),'phone');
isEntered(document.getElementById('company'),'company');
isEntered(document.getElementById('comments'),'comments');

frm.action='/thankyou.aspx?src=contact_us.htm';
}

function isEntered(el, field_name)
{
     if((el.value=="") || (el.value==null))
     {
     pageTracker._trackPageview('/contact_us.htm/empty/'+field_name);
     }

     else
     {
     return false;
     }
}