/* CSS Document */


/*左背景，背景左对齐，y方向阵列*/
.bg_left{
	background-position:left;
	background-repeat:repeat-y;
}

/*右背景，背景右对齐，y方向阵列*/
.bg_right{
	background-position:right;
	background-repeat:repeat-y;
}

/*上背景，背景上对齐，x方向阵列*/
.bg_top{
	background-position:top;
	background-repeat:repeat-x;
}

/*下背景，背景下对齐，x方向阵列*/
.bg_bottom{
	background-position:bottom;
	background-repeat:repeat-x;
}

/*居中背景，背景上下左右居中，不阵列*/
.bg_center{
	background-position: center center;  
	background-repeat:no-repeat;
	
}