自己的第一个Javascript程序

正如 灵感之源所说，语言是相通的！
不过到现在，好象还没专门的Javascript调试环境
还好Mozilla里面带了个，昨天刚下载的，感觉还不错

< html >
< head >
</ head >
< script language = " javascript " >
function  Check()
{
   if (form1.tbx1.value.length < 1 )
     {
         alert( " 姓名不能为空！ " , " 警告 " );
          return   false ;
     }     
   if (form1.tbx2.value.length < 1 )
     {
         alert( " 密码不能为空！ " , " 警告 " );
          return   false ;
     }
   var  sum = eval(form1.tbx1.value + form1.tbx2.value);
  alert(sum, " 警告 " );
}
function  input(select)
{
  if (select == 1 )
   {
       form1.tbx1.value = prompt( " input first one number: " , "" );
        return   false ;
   }
 form1.tbx2.value = prompt( " input second one number: " , "" );
  return   false ;
}
</ script >
  < body >
    < form method = " POST "  name = " form1 "   >
      < p >
     姓名： < input type = " text "  name = " tbx1 "  size = " 20 "  onFocus = " input(1) "   >  
     密码： < input type = " text "  name = " tbx2 "  size = " 20 "  onFocus = " input(2) "   ></ p >
      < p >< input type = " button "  value = " 提交 "  name = " btn1 "  onClick = " Check() " >& nbsp; & nbsp; & nbsp; & nbsp; & nbsp;
      < input type = " button "  value = " 重置 "  name = " Btn2 " ></ p >
    </ form >
    < br >
    < script language = " javascript " >
      // alert("这是我的第一个测试！","呵呵");
       document.writeln( " it works <br> " + "  and I love it " );  
   //      var colors = prompt("输入您需要的颜色:","#ff00ff");
   //      document.write("您选择的颜色是：<font color=#ff00ff>"+colors+"</font>");
     </ script >
  </ body >
</ html >