function setContentHeight() {
	if (document.getElementById) {
		
		if (screen.height<=768 )
			{docHeight=430;}
		 else{
		   if (screen.height>768)
			{docHeight=(screen.height-343)*0.95;}
		}			
	var contentElement = document.getElementById('contentbox');
			contentElement.style.height = docHeight + 'px';
	}
}

/*	
window.onload = function() { 
	setContentHeight()
}
window.onresize = function() {
	setContentHeight()
}
*/