function MM_openBrWindowDinamic(theURL,winName,width,height,params) { //v2.0
 	var scrollbars;
 	var top, left;
 	if (width>screen.availWidth) {
 		width = screen.availWidth - 50;
 		left = 10;
 		scrollbars = ', scrollbars=yes';
	} 
	else {
		left = screen.availWidth/2 - width/2; 
	}
	if (height>screen.availHeight) { 
		height = screen.availHeight - 50;
		top = 10;
		scrollbars = ', scrollbars=yes';
	}
	else {
		top = screen.availHeight/2 - height/2;
	}
	window.open(theURL, winName, 'left=' + left + ', top=' + top + ', width=' + width + ', height=' + height + ',' + params );
}