<form name="form1">
<input type=button value="提交到页面A" onclick="javascript:document.form1.action='A.asp';document.form1.submit();">
<input type=button value="提交到页面B" onclick="javascript:document.form1.action='B.asp';document.form1.submit();">
</form>
<input type=button value="提交到页面A" onclick="javascript:document.form1.action='A.asp';document.form1.submit();">
<input type=button value="提交到页面B" onclick="javascript:document.form1.action='B.asp';document.form1.submit();">
</form>
<form name="">
<input type=button value="提交到页面A" onclick="this.form.action='A.asp';this.form.submit();">
<input type=button value="提交到页面B" onclick="this.form.action='B.asp';this.form.submit();">
<input type=button value="提交到页面C" onclick="this.form.action='C.asp';this.form.submit();">
</form>
<form>
<input type=submit value="提交到页面A" onclick="action='A.asp'">
<input type=submit value="提交到页面B" onclick="action='B.asp'">
<input type=submit value="提交到页面C" onclick="action='C.asp'">
</form>