<form id="myform" name="form1" method="post" action=""> 
  
  <p> 
    <label> 
    <input type="text" name="textfield" /> 
    </label> 
</p> 
  <p> 
    <input type="submit" name="Submit" value="提交1"  onclick="document.myform.action='a.asp';document.myform.submit();" /> 
    
    <input type="submit" name="Submit2" value="提交2" onclick="onclick=document.myform.action='index.asp';document.myform.submit();" /> 
    
    </p> 
</form>