function initScript(){
	startSameHeight();
	window.setInterval(startSameHeight, 300);
}
function startSameHeight(){
	sameHeight({
		tagName:'div',
		tagClass:'column-content'
	});
}

function sameHeight(_options){
	var _tagName=_options.tagName;
	var _tagClass=_options.tagClass;
	var maxHeight=0;
	var _elements=document.getElementsByTagName(_tagName)
	var re=eval('/'+_tagClass+'\\'+'b/');
	
	if(_elements){
		for(var i=0;i<_elements.length;i++){
			if(re.test(_elements[i].className)){
				_elements[i].style.height='auto';
				if(_elements[i].offsetHeight>=maxHeight){
					maxHeight=_elements[i].offsetHeight;
				}
			}
		}
		for(var i=0;i<_elements.length;i++){
			if(re.test(_elements[i].className)){
				_elements[i].style.height=maxHeight+'px';
			}
		}
	}
}

if(window.addEventListener){
	window.addEventListener("load",initScript,false);
}else if(window.attachEvent){
	window.attachEvent("onload",initScript);
}