/********************************************************************************/

function apri_chiudi(id, azione){
   if(azione=='apri'){
	 document.getElementById(id+'_aperto').style.display='block';
	 document.getElementById(id+'_chiuso').style.display='none';
   }
   else {
	 document.getElementById(id+'_aperto').style.display='none';
	 document.getElementById(id+'_chiuso').style.display='block';
   }
}

/********************************************************************************/

function apri_chiudi_table(id, azione){
   if(azione=='apri'){
	 document.getElementById(id+'_aperto').style.display='display';
	 document.getElementById(id+'_chiuso').style.display='none';
   }
   else {
	 document.getElementById(id+'_aperto').style.display='none';
	 document.getElementById(id+'_chiuso').style.display='display';
   }
}

/********************************************************************************/

function apri_chiudi_singolo(id, azione){
   if(azione=='apri'){
	 document.getElementById(id).style.display='block';
   }
   else if(azione=='chiudi') {
	 document.getElementById(id).style.display='none';
   }
}

/********************************************************************************/

function alterna_visibilita(id) {
   var e = document.getElementById(id);
   if(e.style.display == 'block')
	  e.style.display = 'none';
   else
	  e.style.display = 'block';
}

/********************************************************************************/

function selectAll(o_select) {
  var x = document.getElementById(o_select);         
  for (i=0; i<x.length; i++){
    x.options[i].selected = true;
  }
} 
	
/********************************************************************************/

function deseleziona_opzione(o_select, o_valore_option) {
  var x = document.getElementById(o_select);
  for (i=0; i<x.length; i++){
    if (x.options[i].value == o_valore_option) x.options[i].selected = false;
  }
}
/********************************************************************************/

/*function redirect_radio_var(frm,rad,path){
	var r = "";
	for (i=0; i<frm.elements[rad].length; i++){
		if (frm.elements[rad][i].checked){
			r = frm.elements[rad][i].value;
		}
	}
	if (r == ""){
		alert("Scegli una riga.");
	}
	else{
		window.location = path + r;
	}
}
*/
function redirect_radio_var(frm,rad,path){
	var r_valore = "";
	var r = frm.elements[rad];
	if (r.length) {
		for (i=0; i<r.length; i++){
			if (r[i].checked) r_valore = r[i].value;
		}
	} else {
		if (r.checked) r_valore = r.value;
	}
	
	if (r_valore == ""){
		alert("Scegli una riga.");
	} else{
		window.location = path + r_valore;
	}
}
/********************************************************************************/

function cambia_classe_css(elemento,classe) {
	if (elemento.className != classe)
	{
		elemento.className = classe;
	}
}

/***********************************************
* Bookmark site script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/
function bookmarksite(title,url){
	if (window.sidebar) // firefox
		window.sidebar.addPanel(title, url, "");
	else if(window.opera && window.print){ // opera
		var elem = document.createElement('a');
		elem.setAttribute('href',url);
		elem.setAttribute('title',title);
		elem.setAttribute('rel','sidebar');
		elem.click();
	} 
	else if(document.all)// ie
		window.external.AddFavorite(url, title);
}

/********************************************************************************/

/* float per righe tabelle */
var dnd_attivo = false;

document.onmousemove = function(ev){
    if (dnd_attivo) {
	if (currenttable && currenttable.dragObject) {
        ev   = ev || window.event;
        var mousePos = currenttable.mouseCoords(ev);
        var y = mousePos.y - currenttable.mouseOffset.y;
        if (y != currenttable.oldY) {
            // work out if we're going up or down...
            var movingDown = y > currenttable.oldY;
            // update the old value
            currenttable.oldY = y;
            // If we're over a row then move the dragged row to there so that the user sees the
            // effect dynamically
            var currentRow = currenttable.findDropTargetRow(y);
            if (currentRow) {
                if (movingDown && currenttable.dragObject != currentRow) {
                    currenttable.dragObject.parentNode.insertBefore(currenttable.dragObject, currentRow.nextSibling);
                } else if (! movingDown && currenttable.dragObject != currentRow) {
                    currenttable.dragObject.parentNode.insertBefore(currenttable.dragObject, currentRow);
                }
            }
        }

        return false;
    }
	}
}

// Similarly for the mouseup
document.onmouseup   = function(ev){
    if (dnd_attivo) {
    if (currenttable && currenttable.dragObject) {
        var droppedRow = currenttable.dragObject;
        // If we have a dragObject, then we need to release it,
        // The row will already have been moved to the right place so we just reset stuff
        currenttable.dragObject   = null;
        // And then call the onDrop method in case anyone wants to do any post processing
        currenttable.onDrop(currenttable.table, droppedRow);
        currenttable = null; // let go of the table too
    }
	}
}


/** get the source element from an event in a way that works for IE and Firefox and Safari
 * @param evt the source event for Firefox (but not IE--IE uses window.event) */
function getEventSource(evt) {
    if (window.event) {
        evt = window.event; // For IE
        return evt.srcElement;
    } else {
        return evt.target; // For Firefox
    }
}

/**
 * Encapsulate table Drag and Drop in a class. We'll have this as a Singleton
 * so we don't get scoping problems.
 */
function TableDnD() {
    /** Keep hold of the current drag object if any */
    this.dragObject = null;
    /** The current mouse offset */
    this.mouseOffset = null;
    /** The current table */
    this.table = null;
    /** Remember the old value of Y so that we don't do too much processing */
    this.oldY = 0;

    /** Initialise the drag and drop by capturing mouse move events */
    this.init = function(table) {
		this.table = table;
        var rows = table.tBodies[0].rows; //getElementsByTagName("tr")
        for (var i=0; i<rows.length; i++) {
			// John Tarr: added to ignore rows that I've added the NoDnD attribute to (Category and Header rows)
			var nodrag = rows[i].getAttribute("NoDrag")
			if (nodrag == null || nodrag == "undefined") { //There is no NoDnD attribute on rows I want to drag
				this.makeDraggable(rows[i]);
			}
        }
    }

    /** This function is called when you drop a row, so redefine it in your code */
    this.onDrop = function(table, droppedRow) {
        var rows = this.table.tBodies[0].rows;
        var debugStr = "";
        for (var i=0; i<rows.length; i++) {
            debugStr += rows[i].id+" ";
        }
        document.getElementById('ordine').value = debugStr;
    }

	/** Get the position of an element by going up the DOM tree and adding up all the offsets */
    this.getPosition = function(e){
        var left = 0;
        var top  = 0;
		/** Safari fix -- thanks to Luis Chato for this! */
		if (e.offsetHeight == 0) {
			/** Safari 2 doesn't correctly grab the offsetTop of a table row
			    this is detailed here:
			    http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari/
			    the solution is likewise noted there, grab the offset of a table cell in the row - the firstChild.
			    note that firefox will return a text node as a first child, so designing a more thorough
			    solution may need to take that into account, for now this seems to work in firefox, safari, ie */
			e = e.firstChild; // a table cell
		}

        while (e.offsetParent){
            left += e.offsetLeft;
            top  += e.offsetTop;
            e     = e.offsetParent;
        }

        left += e.offsetLeft;
        top  += e.offsetTop;

        return {x:left, y:top};
    }

	/** Get the mouse coordinates from the event (allowing for browser differences) */
    this.mouseCoords = function(ev){
        if(ev.pageX || ev.pageY){
            return {x:ev.pageX, y:ev.pageY};
        }
        return {
            x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
            y:ev.clientY + document.body.scrollTop  - document.body.clientTop
        };
    }

	/** Given a target element and a mouse event, get the mouse offset from that element.
		To do this we need the element's position and the mouse position */
    this.getMouseOffset = function(target, ev){
        ev = ev || window.event;

        var docPos    = this.getPosition(target);
        var mousePos  = this.mouseCoords(ev);
        return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
    }

	/** Take an item and add an onmousedown method so that we can make it draggable */
    this.makeDraggable = function(item) {
        if(!item) return;
        var self = this; // Keep the context of the TableDnd inside the function
        item.onmousedown = function(ev) {
            // Need to check to see if we are an input or not, if we are an input, then
            // return true to allow normal processing
            var target = getEventSource(ev);
            if (target.tagName == 'INPUT' || target.tagName == 'SELECT') return true;
            currenttable = self;
            self.dragObject  = this;
            self.mouseOffset = self.getMouseOffset(this, ev);
			dnd_attivo = true;
            return false;
        }
        item.style.cursor = "n-resize";
    }

    /** We're only worried about the y position really, because we can only move rows up and down */
    this.findDropTargetRow = function(y) {
        var rows = this.table.tBodies[0].rows;
		for (var i=0; i<rows.length; i++) {
			var row = rows[i];
			// John Tarr added to ignore rows that I've added the NoDnD attribute to (Header rows)
			var nodrop = row.getAttribute("NoDrop");
			if (nodrop == null || nodrop == "undefined") {  //There is no NoDnD attribute on rows I want to drag
				var rowY    = this.getPosition(row).y;
				var rowHeight = parseInt(row.offsetHeight)/2;
				if (row.offsetHeight == 0) {
					rowY = this.getPosition(row.firstChild).y;
					rowHeight = parseInt(row.firstChild.offsetHeight)/2;
				}
				// Because we always have to insert before, we need to offset the height a bit
				if ((y > rowY - rowHeight) && (y < (rowY + rowHeight))) {
					// that's the row we're over
					return row;
				}
			}
		}
		return null;
	}
}