How does an Action call two different methods

 
<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=" repair   change  " onClick="modify()"> 
<INPUT Type="Button" Name="Delete" value=" delete   In addition to  " onClick="delete()"> 
</form>