function setHeight() {
	var myHeight = 0;
 	if( typeof( window.innerWidth ) == 'number' ) {
   		myHeight = window.innerHeight;
 	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
   		myHeight = document.documentElement.clientHeight;
 	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
   		myHeight = document.body.clientHeight;
 	}
 	myHeigth = myHeight - 236
 	//window.alert( 'Height = ' + myHeight );
 	if (document.all) {
 		document.all('maincontent').style.height = myHeigth + 'px';
 	} else {
 		document.getElementById('maincontent').style.height = myHeigth + 'px';
 	}
}
window.onload = setHeight;
window.onresize = setHeight;