function isIE8(){
		return (navigator.appVersion.indexOf("MSIE 8") != -1) ? true : false;
	}
	function isIE7(){
		return (navigator.appVersion.indexOf("MSIE 7") != -1) ? true : false;
	}
	function isIE_() {
		return (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
	}
	function isIE(){
		return (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
	}
	function changeStyle(container,ie8class,ie7class) 
	{
		var elem = document.getElementById(container);
		if (elem) {
			if (isIE7()) {
				elem.className = ie7class;
			}else if (isIE8()) {
				elem.className = ie8class;
			}
		}
	}
	function changeHeight(e,b8,b7) {
		var elem = document.getElementById(e);
		if (elem) {
			if (isIE7()) {
				elem.style.height = b7;
			}else if (isIE8()) {
				elem.style.height = b8;
			}
		}
	}
	
	function resizeElementHeightByOther(e, c) {
		if (isIE_()) {
			var elem = document.getElementById(e);
			var container = document.getElementById(c);
			elem.style.height = container.offsetHeight;
		}
	}