如何在使用子元素滚动条时禁用可拖动的div

I have a jQuery draggable container div with a side scroll bar that should not be draggable when I am scrolling up and down. .infotext is the inner div that has the text, contained within #infobody which is set to overflow:auto. I need a way to negate the draggable function on the parent div when the child scrollbar is selected. Here is my code:I have a jQuery draggable container div with a