function browser_max(){
if (!document.getElementById('ifr_ext')) return;
document.getElementById('measure').style.height='0%';
document.getElementById('measure').style.height='100%';

measure_height=document.getElementById('measure').offsetHeight

content_height=document.getElementById('content_i_menu').offsetHeight
content_top=document.getElementById('content_i_menu').offsetTop


content_sum=content_top+content_height

difference=measure_height-content_sum;

document.getElementById('content').style.height=content_height+difference-60+'px';

ifr_height=document.getElementById('ifr_ext').offsetHeight;

document.getElementById('ifr_ext').style.height='100%';
//if (ifr_height<content_height) {document.getElementById('ifr_ext').style.height=content_height+'px';}

}