function makeEqualHeight()
{
	var leftMenu=document.getElementById('leftmenu');
	var content=document.getElementById('content');
	var leftMenuHeight=leftMenu.offsetHeight;
	var contentHeight=content.offsetHeight;
	var maxSize=Math.max(leftMenuHeight,contentHeight);
	leftMenu.style.height=maxSize+'px';
	content.style.height=maxSize+'px';
}