window.onload = function(){




var max_height = Math.max( document.getElementById("contents_contena").offsetHeight , document.getElementById("menu_contena").offsetHeight , document.getElementById("sub_contena").offsetHeight ) ;

//alert(max_height) ;

max_height = max_height + "px" ;
	
	 document.getElementById("contents_contena").style.height = max_height ;
	 document.getElementById("menu_contena").style.height = max_height ;
	 document.getElementById("sub_contena").style.height = max_height ;
	
	
}