function resize(){
    if(document.getElementById('content_body').offsetHeight>730){
        diff=document.getElementById('content_body').offsetHeight-730;
        document.getElementById('content_bottom').style.top=diff+parseInt(document.getElementById('content_bottom').offsetTop)+"px";

    }
    if(document.getElementById('grise')){
        document.getElementById('grise').style.height=document.getElementById('content_body').offsetHeight+400+'px';
    }
}
function swap(pic){
    original=pic.src;
    over=pic.src.substring(0,pic.src.length-4)+"_over.png";
    pic.src=over;
    pic.onmouseout=function(){
        pic.src=original;
    }
}