p.style.position = "absolute"
p.style.left="100px"
p.style.top="100px"
<html><head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var p_1=document.getElementById('p1')
var p_2=document.getElementById('p2')
var d_c=document.createElement("div")
d_c = p_1
d_c.id = 'p3'
var d_d=document.createElement("div")
d_d = p_2
d_d.id='p4'
//alert(d_d.innerHTML)
$(".btn1").click(function(){
//$("#p2").replaceWith($("#p4").html())
//$("#p1").replaceWith($("#p3").html())
$("#p2").replaceWith("<div>4444</div>")
$("#p1").replaceWith("<div>3333</div>")
//$("#p1").replaceWith($t("#p4").html())
// alert($("#p3").text())
//alert($("#p4").text())
})
})
</script>
<style>
div{height:20pxbackground-color:yellow}
</style>
</head>
<body>
<div id='p1'>This is a paragraph.11111</div>
<div id='p2'>This is another paragraph.222222</div>
<div id='div1'>333333333</div>
<button class="btn1">用粗体文本替换所有段落</button>
</body>
</html>