// Get screen size 
var myWidth = 100;
var myHeight = 50;

function alertSize() {
  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;
  }
//window.alert( 'Width = ' + myWidth );
//window.alert( 'Height = ' + myHeight );
}




alertSize();
var cw = myWidth - 300;
if (myWidth <= 1280) cw = myWidth - 150;
var ch = myHeight - 200;
document.write('<div id="contentpanel" style="width:' + cw + 'px; height:' + ch + 'px;">');