/*------------------------------------------------------------*/
pagina=null;
function apriPopup (url,w,h){
if (pagina != null)
	pagina.close();
	var TopMessaggio=0;
	var LeftMessaggio=0;
	var x=0;
	var y=0;
	var arrayPageScroll=getPageScroll();
	var arrayPageSize=getPageSize();	
	TopMessaggio = arrayPageScroll[1] + ((arrayPageSize[3] - 30 - h) / 2)+33;
	LeftMessaggio = ((arrayPageSize[0] - 30 - w) / 2);
	x = (TopMessaggio < 0) ? "0px" : TopMessaggio + "px";
	y = (LeftMessaggio < 0) ? "0px" : LeftMessaggio + "px";
	pagina=window.open(url,"","resizable=no,fullscreen=no,status=no,toolbar=no,scrollbars=yes,width="+w+",height="+h+",top="+x+",left="+y);

}

/*------------------------------------------------------------*/
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;
	}
	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}
/*------------------------------------------------------------*/
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;
}
/*-------------------------------------------*/