function open_win2 (my_path,w,h){
		pop_win = window.open(my_path,'pop_win','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizeable=no,copyhistory=no,width='+w+',height='+h+',marginwidth=0,marginheight=0');
};

function open_win (my_path,w,h){
	largo=250;
	alto=230;
	posh=Math.floor((screen.height-alto)/2); 
	posw=Math.floor((screen.width-largo)/2);
	
	pop_win = window.open('newsletter.asp','pop_win','scrollbars=no,width='+largo+',height='+alto+',top='+posh+',left='+posw);

};