function validateForm() {

var errors = "";

if(null==document.forms.add_advert.advert_title.value || 0 == document.forms.add_advert.advert_title.value.length )
{
 errors+="* You must enter a title for your advert.\n";

}

if(null==document.forms.add_advert.advert_text.value || 0==document.forms.add_advert.advert_text.value.length)
{
errors +="* There must be some text in your advert.\n";

}

if(null==document.forms.add_advert.new_price.value || 0==document.forms.add_advert.new_price.value.length)
{
errors +="* Please enter a price.\n";

}

if(errors) { 

var message = "The following errors have occured : \n\n" + errors;

alert(message);
return false;

} 

}


function validateClassReplyForm() {

var errors = "";

if(null==document.forms.class_reply.advert_reply_name.value || 0 == document.forms.class_reply.advert_reply_name.value.length )
{
 errors+="* You must enter your name.\n";

}

if(null==document.forms.class_reply.advert_reply_email.value || 0 == document.forms.class_reply.advert_reply_email.value.length )
{
 errors+="* You must enter an email address.\n";

}


if(null==document.forms.class_reply.advert_reply_message.value || 0 == document.forms.class_reply.advert_reply_message.value.length )
{
 errors+="* You must enter a reply message.\n";

}

if(errors) { 

var message = "The following errors have occured : \n\n" + errors;

alert(message);
return false;

} else {

var msg="You are about to submit your reply.\n\n Please confirm to proceed. \n\n";

    if (confirm(msg)) 
	return true;
else
	return false;

}

}

function validateEditForm() {

var errors = "";

if(null==document.forms.add_advert.advert_title.value || 0 == document.forms.add_advert.advert_title.value.length )
{
 errors+="* You must enter a title for your advert.\n";

}

if(null==document.forms.add_advert.advert_text.value || 0==document.forms.add_advert.advert_text.value.length)
{
errors +="* There must be some text in your advert.\n";

}

if(null==document.forms.add_advert.new_price.value || 0==document.forms.add_advert.new_price.value.length)
{
errors +="* Please enter a price.\n";

}

if(errors) { 

var message = "The following errors have occured : \n\n" + errors;

alert(message);
return false;

} 

}