function windowHeight(){
	var alto= 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		alto= window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		alto= document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		alto= document.body.clientHeight;
	}
	return alto;
}

function setHeightcont()
	{
		var winH = windowHeight(), setH;
        var blockH = document.getElementById('content').offsetHeight;
        var heightNeeded=winH-235;
        if(blockH > heightNeeded) {
            setH = '100%';
        } else {
           setH = heightNeeded+'px'
        }
        if( typeof( window.innerWidth ) != 'number' )
		{
                         document.getElementById('content').style.height=setH;
        } else {

            document.getElementById('content').style.minHeight=setH;
        }
    }