//Calcola l'ascissa del punto sulla pagina in cui si � effettuata la chiamata alla funzione
function findPosX(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;
	return curleft;
}



//Calcola l'ordinata del punto sulla pagina in cui si � effettuata la chiamata alla funzione
function findPosY(obj)
{
	if(obj)
	{
		var curtop = 0;
		if (obj.offsetParent)
		{
			while (obj.offsetParent)
			{
				curtop += obj.offsetTop
				obj = obj.offsetParent;
			}
		}
		else if (obj.y)
			curtop += obj.y;
		return curtop;
	}
}



///////////////////////////////////////////////////////////////////////////
//
//   G R A N D E Z Z A    D E L L A    F I N E S T R A

//Restituisce un array con larghezza ed altezza della finestra del browser
function getWindowSize() {
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}

	arrayPageSize = new Array(windowWidth,windowHeight)
	return arrayPageSize;
}

// Returns array with page width, height and window width, height
function getPageSize(){

     var xScroll, yScroll;

     if (window.innerHeight && window.scrollMaxY) {
          xScroll = document.body.scrollWidth;
          yScroll = window.innerHeight + window.scrollMaxY;
     } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
          xScroll = document.body.scrollWidth;
          yScroll = document.body.scrollHeight;
     } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
          xScroll = document.body.offsetWidth;
          yScroll = document.body.offsetHeight;
     }

     var windowWidth, windowHeight;
     if (self.innerHeight) {     // all except Explorer
          windowWidth = self.innerWidth;
          windowHeight = self.innerHeight;
     } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
          windowWidth = document.documentElement.clientWidth;
          windowHeight = document.documentElement.clientHeight;
     } else if (document.body) { // other Explorers
          windowWidth = document.body.clientWidth;
          windowHeight = document.body.clientHeight;
     }

     // for small pages with total height less then height of the viewport
     if(yScroll < windowHeight){
          pageHeight = windowHeight;
     } else {
          pageHeight = yScroll;
     }

     // for small pages with total width less then width of the viewport
     if(xScroll < windowWidth){
          pageWidth = windowWidth;
     } else {
          pageWidth = xScroll;
     }

     arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
     return arrayPageSize;
}

function getPageScroll(){
	var yScroll;
	
	if (self.pageYOffset) {
	yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
	yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
	yScroll = document.body.scrollTop;
	}
	return yScroll;
}

function getFullPageScroll(){
	
	var scrOfX = 0, scrOfY = 0;
	  if( typeof( window.pageYOffset ) == 'number' ) {
	    //Netscape compliant
	    scrOfY = window.pageYOffset;
	    scrOfX = window.pageXOffset;
	  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
	    //DOM compliant
	    scrOfY = document.body.scrollTop;
	    scrOfX = document.body.scrollLeft;
	  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
	    //IE6 standards compliant mode
	    scrOfY = document.documentElement.scrollTop;
	    scrOfX = document.documentElement.scrollLeft;
	  }
	  // alert([ scrOfX, scrOfY ]);
	  return [ scrOfX, scrOfY ];
}


// Returns array with top, left of the object
function getElementPosition(id)
{
	var el = document.getElementById(id);
	var y = parseInt(findPosY(el));
	return y;
}