function getClientWidth()  
{  
   var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
	return myWidth;
}  
  
function getClientHeight()  
{   
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
	return myHeight;
}  

function DOMGetElement(o) {
  if (document.getElementById) return document.getElementById(o);
  else if (document.all)             return document.all[o];
  else if (document.layers)          return document.layers[o];
  return null;
}

function DOMElementGetHeight(o) {
  if (document.all)                 return o.clientHeight;
  else if (document.getElementById) return parseInt(o.offsetHeight);
  else if (document.layers)         return o.document.height;
}

function DOMElementGetWidth(o) {
  if (document.all)                 return o.clientWidth;
  else if (document.getElementById) return parseInt(o.offsetWidth);
  else if (document.layers)         return o.document.width;
}

function getMarginByWidth(w) {
	var w1=800, w2=1024, m1=20, m2=70;
    if (w>=w2) return m2;
    else if (w<=w1) return m1;
    else return (m2-m1)*(w-w1)/(w2-w1)+m1;
}

function setMarginsForElement(id) {
	var o = DOMGetElement(id);
	o.style.marginLeft = getMarginByWidth(getClientWidth())+'px';
	o.style.marginRight = o.style.marginLeft;
}