帮我看一下这个简单的显示不显示问题.
<select   name= "typetie ">
                <option   value= "0 "> 普通贴 </option>
                <option   value= "1 "> 问答贴 </option>
            <   lect>
<div   id= "postgold "   style= "display:none "> 给分: <input   name= "postgold "   type= "text "   size= "4 "   maxlength= "4 "   /> </div>

如何做到如果select   value=1   则postgold的display:none变成block  

请详细一点啊.

------解决方案--------------------
<select name= "typetie " onchange= "document.getElementById( 'postgold ').style.display=this.value== '1 '? 'block ': 'none ' ">