js通过八个点 拖动改变div大小的实现方法

复制代码 代码如下:





#rRightDown,#rLeftDown,#rLeftUp,#rRightUp,#rRight,#rLeft,#rUp,#rDown{
position:absolute;background:#C00;width:6px;height:6px;z-index:5;font-size:0;}
#rLeftDown,#rRightUp{cursor:ne-resize;}
#rRightDown,#rLeftUp{cursor:nw-resize;}
#rRight,#rLeft{cursor:e-resize;}
#rUp,#rDown{cursor:n-resize;}
#rRightDown{ bottom:-3px; right:-3px;}
#rLeftDown{ bottom:-3px; left:-3px;}
#rRightUp{ top:-3px; right:-3px;}
#rLeftUp{ top:-3px; left:-3px;}
#rRight{ right:-3px; top:50%}
#rLeft{ left:-3px; top:50%}
#rUp{ top:-3px; left:50%}
#rDown{ bottom:-3px; left:50%}