function auto_height(){

	////////////g'Y<P
	
	var max;
	
	max=0;
	
	if(typeof(left) != "undefined")
	
		max=left.scrollHeight;
	
	if(typeof(middle) != "undefined"){
	
		if(middle.scrollHeight>max)
		
		max=middle.scrollHeight;
		
	}
	
	if(typeof(right) != "undefined"){
	
		if(right.scrollHeight>max)
		
		max=right.scrollHeight;
	
	}
	
	///////////ꁨR�[MOB\
	
	if(typeof(left) != "undefined"){
	
		if(left.scrollHeight<max)
		
		document.all.left.style.height=max;
	
	}
	
	if(typeof(middle) != "undefined"){
	
		if(middle.scrollHeight<max)
		
		document.all.middle.style.height=max;
	
	}
	
	
	if(typeof(right) != "undefined"){
	
		if(right.scrollHeight<max)
		
		document.all.right.style.height=max;
	
	}
	
	if(typeof(bottom) != "undefined"){
	
		if(bottom.scrollHeight<max){
		
			if(typeof(head) != "undefined")
			
				document.all.bottom.style.top=max+head.scrollHeight+20;
			
			else
			
				document.all.bottom.style.top=max+20;
		
		}
	
	}

	if(typeof(main_bottom) != "undefined"){
	
			if(typeof(head) != "undefined")
			
				document.all.main_bottom.style.top=max+head.scrollHeight+10;
			
			else
			
				document.all.main_bottom.style.top=max+10;
	
	}
	/////////end

}