一个Action如何调用两个不同的方法

<Script Language="javascript"> 
function modify() 
{ 
document.form1.action="modify.jsp"; 
document.form1.submit(); 
} 
function delete() 
{ 
document.form1.action="delete.jsp"; 
document.form1.submit(); 
} 
</Script> 
<form name="form1" action=""> 
<INPUT Type="Button" Name="Modify" value="修 改 " onClick="modify()"> 
<INPUT Type="Button" Name="Delete" value="删 除 " onClick="delete()"> 
</form>