Question

jsp中如何手动添加滚动条 也就是 写个纯JS的滚动条或者更好的方法实现

Answer 1

<script language="javascript">
$(function(){
$("#all").css({"height":"auto","width":"100%","overflow":"hidden","float":"left"});//追加样式
if($(document).height() > $(window).height()){
$("#all").css({"height":$(window).height()-35,"width":"100%","overflow":"auto","float":"left"});//追加样式
}
$(window).resize(function(){
$("#all").css({"height":"auto","width":"100%","overflow":"auto","float":"left"});//追加样式
if( $("#all").height() >= $(window).height()-35() ){
$("#all").css({"height":$(window).height()-35,"width":"100%","overflow":"auto","float":"left"});//追加样式
}else{
$("#all").css({"height":$(window).height()-35,"width":"100%","overflow":"hidden","float":"left"});//追加样式
}
});
}); 将要添加滚动条的部分用<DIV ID="all" ></div> 包含进来
</script>

Answer 2

jsp中滚动条是通过js来控制的。
JS控制滚动条的位置：
window.scrollTo(x,y);
竖向滚动条置顶(window.scrollTo(0,0);
竖向滚动条置底 window.scrollTo(0,document.body.scrollHeight)
JS控制TextArea滚动条自动滚动到最下部
document.getElementByIdx_x('textarea').scrollTop = document.getElementByIdx_x('textarea').scrollHeight