var srcNum=1;
function srcc(){
srcNum++;
document.getElementById("myiframe").src="nihao.asp?"+srcNum;
}
<a href="javascript:void(0)" onclick="srcc()">next</a>
<iframe id="myiframe" src="nihao.asp?id=1"></iframe>
function srcc(){
srcNum++;
document.getElementById("myiframe").src="nihao.asp?"+srcNum;
}
<a href="javascript:void(0)" onclick="srcc()">next</a>
<iframe id="myiframe" src="nihao.asp?id=1"></iframe>
<head>
<title>
sdfsdf
</title>
<script>
function cAdd()
{
var cI = parseInt(document.all.Loading.name) + 1;
document.all.Loading.name = cI ;
document.all.Loading.src = "http://www.baidu.com?id="+cI ;
}
</script>
</head>
<body>
<a href="javascript:cAdd()" style="Color:black">点击</a>
<iframe ID="Loading" name="1" src="http://www.baidu.com?id=1" width="300"></iframe>
</body>
</html>自己写了一下,看合不合试