function fitBody(){
var new_width;
if (document.all) {
new_width = ( document.body.offsetWidth - 890 ) / 2;
if (document.body.offsetWidth > 890 && document.body.offsetWidth < 1020 ) new_width = new_width + new_width;
else if (document.body.offsetWidth < 890) new_width = 0;
else new_width += 40;
document.all.page_body.style.left = new_width;
} else if (document.layers) {
new_width = ( window.innerWidth - 890 ) / 2;
if (window.innerWidth > 890 && window.innerWidth < 1020 ) new_width = new_width + new_width;
else if (window.innerWidth < 890) new_width = 0;
else new_width += 40;
document.layers.page_body.left = new_width;
} else if(document.getElementById("page_body")) {
new_width = ( window.innerWidth - 890 ) / 2;
if (window.innerWidth > 890 && window.innerWidth < 1020 ) new_width = new_width + new_width;
else if (window.innerWidth < 890) new_width = 0;
else new_width += 40;
document.getElementById("page_body").style.left = new_width + "px";
}
}