function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


function getWindowInnerH(){
var innerH = null;
if (typeof(window.innerHeight) == "number"){//MOZILLA, OPERA
innerH = window.innerHeight;
}else if (typeof(document.documentElement.clientHeight) == "number"){//IE 6+
innerH = document.documentElement.clientHeight;
}

return innerH;
}

function arrange(){
var hdrE = document.getElementById("hdr");
var mainE = document.getElementById("main");
var footE = document.getElementById("foot");

if (!hdrE || !mainE || !footE){
return;
}

//get window's inner height
var innerH = getWindowInnerH();

//get hdr's and foot's height
var hdrH = 100;//hdrE.offsetHeight;
var footH = 100;//footE.offsetHeight;
//calc main's heigth
var mainH = Math.round(innerH - (hdrH + footH));

//set hdr's and foot's height
hdrE.style.height = hdrH + "px";
footE.style.height = footH + "px";

//set main's height
mainE.style.height = mainH + "px";

}

//window.onresize = arrange;