function ValidateForm(form)
{
     if(form.date.value=="")
   { 
      alert('Please enter todays Date') 
      form.date.focus(); 
      return false; 
   }  
        if(form.email.value=="")
   { 
      alert('Please enter your email address.') 
      form.email.focus(); 
      return false; 
   }  
 if(form.tradingas.value=="")
   { 
      alert('Please enter a trading name.') 
      form.tradingas.focus(); 
      return false; 
   }  
      
   if(form.contactname.value=="")
   { 
      alert('Please enter a contact name.')
      form.contactname.focus(); 
      return false; 
   }    
   
    if(form.address.value=="")
   { 
      alert('Please enter your address.') 
      form.address.focus(); 
      return false; 
   }   
   
    if(form.cpostcode.value=="")
   { 
      alert('Please enter your post code.') 
      form.cpostcode.focus(); 
      return false; 
   }  
    if(form.ctelephone.value=="")
   { 
      alert('Please enter your telephone number.') 
      form.ctelephone.focus(); 
      return false; 
   }    
    if(form.companynumber.value=="")
   { 
      alert('Please enter your company registration number.') 
      form.companynumber.focus(); 
      return false; 
   } 
    if(form.adsize.value=="")
   { 
      alert('Please enter an advert size.') 
      form.adsize.focus(); 
      return false; 
   }  
     if(form.adinserts.value=="")
   { 
      alert('Please enter a number of inserts.') 
      form.adinserts.focus(); 
      return false; 
   }  
   
     if(form.adnum.value=="")
   { 
      alert('Please enter a number of advertisements.') 
      form.adnum.focus(); 
      return false; 
   }  
       if(form.admonth.value=="")
   { 
      alert('Please enter a month of insertion.') 
      form.admonth.focus(); 
      return false; 
   } 
    if(form.adrate.value=="")
   { 
      alert('Please enter an advert gross rate.') 
      form.adrate.focus(); 
      return false; 
   }  
     if(form.adnetrate.value=="")
   { 
      alert('Please enter an advert net rate.') 
      form.adnetrate.focus(); 
      return false; 
   }  
        if(form.signed.value=="")
   { 
      alert('You must digitally sign to submit this form.') 
      form.signed.focus(); 
      return false; 
   } 
 return true;
 }