Textboxe inside gridview not going to next while press enter

I have a gridview in which template field are there and contain textboxes,dropdowlist in each cell. In my application

I need to go to next cell in gridview while pressing enter. This application is working in internet explorer 10. But its not working in chrome or IE11. While pressing enter it will go from one text box to next but will stop when it reaches the dropdownlist.It only works textboxes inside the gridview.

This is my code for going to next column.

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

ReadOnly="false" Text="<%#Container.DataItemIndex+1 %>" Font-Bold="True">

Text='<%# Eval("Slno")%>' Font-Bold="True">

ontextchanged="txtSlno_TextChanged" Width="70px" Font-Bold="True" />

onkeyup="javascript:__doPostBack('UpdatePanel1','')"

ontextchanged="txtcode_TextChanged" Width="40" BorderStyle="None" Font-Bold="True" />

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

ReadOnly="false" Text='<%# Eval("Code")%>' Width="40" BorderStyle="None" Font-Bold="True">

onkeyup="javascript:__doPostBack('UpdatePanel1','')"

onblur="checkTextField1(this);"

ontextchanged="txtcode_TextChanged" Width="40" BorderStyle="None" Font-Bold="True" />

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;" Font-Bold="True">

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;" Width="74" Font-Bold="True">

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

Text='<%# Eval("Alt")%>'>

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

Text='<%# Eval("details")%>' Width="100%"

ontextchanged="txtdetails_TextChanged">

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

Text='<%# Eval("details") %>' Width="100%">

onkeydown="javascript:if(window.event.keyCode == 13) window.event.keyCode = 9;"

Width="360px">