function getHeight (id) {  
		var gh = $(id).offsetHeight;
		return gh;
	}
	function getWidth (id) {  
		var gh = $(id).offsetWidth;
		return gh;
	}
	function resizeSider(source,arrdiv) {
		var height1 = getHeight(source);
		for (var i=0;i<arrdiv.length;i++) {
			$(arrdiv[i]).style.height = height1 +'px';
		}
	}