function validate (form, error1, error2){
	if (form['login'].value=='' || form['first_name'].value=='' || form['email'].value=='' || form['pass1'].value=='' || form['pass2'].value=='') {
		alert (error1);
		return;
	}
	else {
		if(form['pass1'].value==form['pass2'].value){
			form.submit();
		} else {
			alert (error2);			
		}
	}			
}