<body>
.......
<form name=fm action="yourUrl">
<input type=hidden value="yourStr">
</form>
<script language="JavaScript">
fm.submit();
</script>
......
</body>
.......
<form name=fm action="yourUrl">
<input type=hidden value="yourStr">
</form>
<script language="JavaScript">
fm.submit();
</script>
......
</body>
<script language="JavaScript">
function check(ope){
if(ope=='a'){
form1.action = "a.jsp"
form1.submit()
}
if(ope=='b'){
form1.action = "b.jsp"
form1.submit()
}
}
</script>
<form name="form1">
<input name="but1" type="button" value="转到" onClick="check(<%=参数变量%>)">
</form>
从a.jsp进入c.jsp参数值就为a;
从b.jsp进入c.jsp参数值就为b
然后在c.jsp页面取得这个参数值。