function popup(str,winName,larg,alt){
	finestra=window.open(str,winName,"width=" + larg + ", height="+alt+", left=" + ((screen.width-larg)/2) + ",top="+((screen.height-alt)/2)+", scrollbars, resizable" );
	finestra.focus();
}
function resizeWin(){
	var lar_min = 1200;
	var alt_min = 800;
	//var winW = lar_min, winH = alt_min;

	if (document.body && document.body.offsetWidth) {
 	winW = document.body.offsetWidth;
 	winH = document.body.offsetHeight;
	}
	if (document.compatMode=='CSS1Compat' &&
    	document.documentElement &&
    	document.documentElement.offsetWidth ) {
 	winW = document.documentElement.offsetWidth;
 	winH = document.documentElement.offsetHeight;
	}
	if (window.innerWidth && window.innerHeight) {
 	winW = window.innerWidth;
 	winH = window.innerHeight;
	}
	
	if(winW < lar_min || winH < alt_min){
		if(winW < lar_min)winW = lar_min;
		if(winH < alt_min)winH = alt_min;
		window.resizeTo(winW, winH);
	}

}