function init(){
	var hl = document.getElementById("ht_l").offsetHeight;
	var hr = document.getElementById("ht_r").offsetHeight;
	var h = hl > hr ? hl : hr;
	document.getElementById("ht_l").style.height = h + "px";
	document.getElementById("ht_r").style.height = h + "px";
	// document.getElementById("ba").style.height = h + "px";
}