function validateForm(form) {

if (form.phonenumber.value == "") { 
   alert("Phone number is required."); 
   form.phonenumber.focus( ); 
   return false; 
   }
if (form.name.value == "") { 
   alert("Name is required."); 
   form.name.focus( ); 
   return false; 
   }
if (form.compName.value == "") { 
   alert("Company Name is required."); 
   form.compName.focus( ); 
   return false; 
   }
if (form.emailaddress.value == "") { 
   alert("Email address is required."); 
   form.emailaddress.focus( ); 
   return false; 
   }


}