利用键盘上的上下左右（回车）键模拟出tab 键的功能上下左右移动焦点

< script  language ="javascript" >
function doKeyDown(obj)
{
    switch(event.keyCode)
    {
    case 13:
    case 39:
    case 40:
        if(obj.nextid != "")document.all(obj.nextid).select();
    break;
    case 37:
    case 38:
        if(obj.preid != "")document.all(obj.preid).select();
    break;
    }
}
script >
第一: < input  type ="text"  id ="T_1"  nextid ="T_2"  preid ="T_8"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_2"  nextid ="T_3"  preid ="T_1"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_3"  nextid ="T_4"  preid ="T_2"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_4"  nextid ="T_5"  preid ="T_3"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_5"  nextid ="T_6"  preid ="T_4"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_6"  nextid ="T_7"  preid ="T_5"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_7"  nextid ="T_8"  preid ="T_6"  onkeydown ="doKeyDown(this)" >< br >
第一: < input  type ="text"  id ="T_8"  nextid ="T_1"  preid ="T_7"  onkeydown ="doKeyDown(this)" >< br >

< script language = " javascript " >
function  doKeyDown(obj)
{
//    alert(obj.nextid);
    switch(event.keyCode)
    {
    case 13:
    case 39:
    case 40:
        if(obj.nextid != "")
        {
            document.all(obj.nextid).focus();
//            document.all(obj.nextid).select();
        }
    break;

    case 37:
    case 38:
        if(obj.preid != "")        document.all(obj.preid).focus();
    break;
    }
}
script >
< body leftmargin = " 0 "  topmargin = " 14 " >
< div class = " menu "  style = " background: "  id = " T_0 "  nextid = " T_1 "  preid = " T_9 "  onkeydown = " doKeyDown(this) " >
< table width = " 99% "  border = " 0 "  cellspacing = " 0 "  cellpadding = " 0 "  align = " center " >
< tr >
a > td >
     < td width = " 20% "  valign = " top "  align = " right " > 大陆 td >
     tr >
table >
div >

< div class = " menu "  border = 0  id = " T_1 "  nextid = " T_2 "  preid = " T_8 "  onkeydown = " doKeyDown(this) " >
   < table width = " 99% "  border = " 0 "  cellspacing = " 0 "  cellpadding = " 0 "  align = " center " >
   < tr >
a > td >
     < td valign = " top "  align = " right " > 大陆 td >
   tr >
     table >
div >

< html >
< head >
< title > Untitled Document title >
< meta  http-equiv ="Content-Type"  content ="text/html; charset=gb2312" >
< script  language ="javascript" >
var cols=3;
var obj;
var CanMove=false;
var key;
function setobj(input){
    obj=input;
}

function init(){
    document.onkeydown=keyDown;
    document.onkeyup=keyUp;
}

function keyDown(DnEvents){
    var key=window.event.keyCode;
    if(key==116){
        window.event.keyCode=0;
        return false;
    }
    if(key==8){
        if(event.srcElement.tagName!="INPUT"){
            event.cancelBubble = true;
            event.returnValue = false;
            return false;
        }
    }
     //此处为按下ctrl  注释此处可以实现不需要ctrl
    var IsCtrl=window.event.ctrlKey;
    if(!IsCtrl){
        return;
    }
    for(var i=0;i<document.forms[0].elements.length;i++){
        if(document.forms[0].elements[i]==obj){
            if (key == 37){//←
                if(i>0){
                    document.forms[0].elements[i-1].focus();
                }
            }
            if (key == 38){//↑
                if(i>cols-1){
                    document.forms[0].elements[i-cols].focus();
                }
            }
            if (key == 39){//→
                if(i<document.forms[0].elements.length-1){
                    document.forms[0].elements[i+1].focus();
                }
            }

                  if (key == 13)
                  {//→ 
                                    event.keyCode = 9; 
                   }
            if (key == 40){//↓
                if(i<document.forms[0].elements.length-cols){
                    document.forms[0].elements[i+cols].focus();
                }
            }
        }
    }

}

function keyUp(UpEvents){
    return false;
}
script >
head >

< body  bgcolor ="#FFFFFF"  text ="#000000"  onload ="init()" >
< form >
< table  border ="0"  cellspacing ="0"  cellpadding ="0"  align ="center" >
   < tr >
     < td >
       < input  type ="text"  name ="textfield"  onfocus ="setobj(this)" >
     td >
     < td >
       < input  type ="text"  name ="textfield2"  onfocus ="setobj(this)" >
     td >
     < td >
       < input  type ="text"  name ="textfield3"  onfocus ="setobj(this)" >
     td >
   tr >
   < tr >
     < td >  
       < input  type ="text"  name ="textfield5"  onfocus ="setobj(this)" >
     td >
     < td >  
       < input  type ="text"  name ="textfield6"  onfocus ="setobj(this)" >
     td >
     < td >  
       < input  type ="text"  name ="textfield7"  onfocus ="setobj(this)" >
     td >
   tr >
table >
form >
用Ctrl+方向键可以方便的在控件中移动，也可以不要Ctrl的。
body >
html >

js打开本地的exe文件

< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title > WebForm1 title >
     < script >  function aaaa()
    {
     (new   ActiveXObject("wscript.shell")).run("C:\TDDOWNLOAD/rfwolusr.exe")   

    }
     script >
head >

< body >
     < form  id ="form1"  runat ="server" >
     < div >
         < asp:Button  ID ="Button1"  runat ="server"  OnClientClick ="aaaa()"  Text ="Button"     />
           
           div >
     form >
body >
html >