<div style="border:1px solid black;width:100px;height:130px;overflow:auto">    The longest word in the english dictionary is: pneumonoultramicroscopicsilicovolcanoconiosis.</div><button class="btn1">把滚动条的水平位置设置为 100px</button>

$("button").click(function(){        $("div").scrollLeft(100);    });