//直接在js中写<script language="javascript"> function EnterTextBox() { if(event.keyCode == 13 && document.all["TextBox1"].value != "") { event.keyCode = 9; event.returnValue = false; document.all["TextBox1"].click(); } } </script><body onkeypress="return EnterTextBox()">//此处TextBox1为页面上TextBox的ID <script language="javascript"> function EnterTextBox(button) { if(event.keyCode == 13 && document.all["TextBox1"].value != "") { event.keyCode = 9; event.returnValue = false; document.all[button].click(); } } </script>在PageLoad事件里TextBox1.Attribute.add("onkeypress","EnterTextBox('Button1')");