var h2;
var w2;
var w;
var h;
var minheight=520;
var minwidth=780;
var maxwidth=1997;
var maxheight=1331;

function viewport()
{
w = document.getElementById('image').clientWidth - 250;
h = document.getElementById('image').clientHeight;

if(h>w){
    document.getElementById('about_image').style.height=(w)+"px";
    document.getElementById('about_image').style.left="250px";
}else{
    document.getElementById('about_image').style.height=(h)+"px";
    document.getElementById('about_image').style.left=(document.getElementById('image').clientWidth-h)+"px";
}   

//document.getElementById('about_image').style.left=(h+25)+"px";    

}