function add_article( article_id ) {
	
	var obj_quantity = document.forms['frm_publications'].elements["article_qty_" + article_id];
	
	if ( obj_quantity.value == "" ) {
		return false;
	}
	
	if ( isNaN( obj_quantity.value ) ) {
		alert(getTxt("MSG_QUANTITY_INTEGER"));
	 obj_quantity.focus();
		return false;
	}
	
	if ( obj_quantity.value.indexOf(".") != -1 || obj_quantity.value.indexOf(",") != -1 ) {
		alert(getTxt("MSG_QUANTITY_INTEGER"));
	 obj_quantity.focus();
		return false;
	}
	
	
	document.forms['frm_publications'].elements['cart_action'].value = 'add';
	document.forms['frm_publications'].elements['cart_article_id'].value = article_id;
	document.forms['frm_publications'].elements['cart_after_process_page'].value = document.forms['frm_publications'].elements['cart_after_process_page'].value + "&confirm=1";
	document.forms['frm_publications'].submit();
	return true;
}



function delete_article( article_id ) {
	
	var answer = confirm( getTxt("MSG_CONFIRM_ARTICLE_DELETE") );
	if ( answer == null ) {
		return false;
	}
	if ( answer == false ) {
		return false;
	}
	
	document.forms['frm_publications'].elements['cart_action'].value = 'delete';
	document.forms['frm_publications'].elements['cart_article_id'].value = article_id;
	document.forms['frm_publications'].submit();
	return true;
	
	
}


function edit_cart( order_next ) {
	
	var articles = document.getElementsByTagName("input");
	
	for ( var i = 0; i < articles.length; i++ ) {
		
		if( articles[i].name.indexOf("article_qty_") > -1 ) {
			
			obj_quantity = articles[i];
			
			if ( obj_quantity.value == "" ) {
				return false;
			}
			
			if ( isNaN( obj_quantity.value ) ) {
				alert(getTxt("MSG_QUANTITY_INTEGER"));
				obj_quantity.focus();
				return false;
			}
			
			if ( obj_quantity.value.indexOf(".") != -1 || obj_quantity.value.indexOf(",") != -1 ) {
				alert(getTxt("MSG_QUANTITY_INTEGER"));
				obj_quantity.focus();
				return false;
			}
			
		}		
	}
	
	
	if ( order_next == true ) {
	document.forms['frm_publications'].elements['cart_after_process_page'].value = 'main.php?section=7&sub_section=publication_order_step_1';
	}
	document.forms['frm_publications'].elements['cart_action'].value = 'edit_cart';
	document.forms['frm_publications'].submit();
	return true;
	
	
}



function cart_ID( login ) {
	
	if ( login ) {
		if ( document.forms['frm_publications'].elements['username'].value == "" ) {					
			document.forms['frm_publications'].elements['username'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['password'].value == "" ) {					
			document.forms['frm_publications'].elements['password'].focus();
			return false;
		}
		
	} else {

		if ( document.forms['frm_publications'].elements['firstname'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['firstname'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['lastname'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['lastname'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['address'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['address'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['city'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['city'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['postal_code'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['postal_code'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['province'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['province'].focus();
			return false;
		}
		if ( document.forms['frm_publications'].elements['phone'].value == "" ) {		
			alert( getTxt("MSG_FILL_ALL_FIELDS") );
			document.forms['frm_publications'].elements['phone'].focus();
			return false;
		}

	}
	
	document.forms['frm_publications'].elements['cart_action'].value = 'cart_ID';
	document.forms['frm_publications'].submit();
	return true;
	
}


function send_cart() {
	
	var answer = confirm( getTxt("MSG_CONFIRM_SEND_CART") );
	if ( answer == null ) {
		return false;
	}
	if ( answer == false ) {
		return false;
	}
	
	document.forms['frm_publications'].elements['cart_action'].value = 'send_cart';
	document.forms['frm_publications'].elements['cart_after_process_page'].value = 'main.php?section=7&sub_section=publication_order_step_2&confirm=1';
	document.forms['frm_publications'].submit();
	return true;
	
	
}