標籤：style blog http java color strong io for
1.如何動態修改下拉式清單的預設選中項兩種方法，第一種嵌入java代碼：原理是首先擷取需要選中項，然後用java代碼控制那個標籤內需要添加selected，其中Wish是放在request中的一個對象，僅此而已
<select name="wish.visible"> <%int visible=((Wish)request.getAttribute("wish")).getVisible(); %> <option value="1" <%if(visible==1){%>selected<%}%> >對所有人可見</option> <option value="2" <%if(visible==2){%>selected<%}%> >對好友可見</option> <option value="3" <%if(visible==3){%>selected<%}%> >只對自己可見</option> </select>
第二種方法 是用js解決：原理是頁面載入的時候就去計算出呐哪個選項是預設選中項
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head> <title>Untitled</title> <script> function PageInit(){ var str="${sessionSocpe.inf}"; var obj=document.getElementById("sex"); for(var i=0;i<obj.options.length;i++){ if(obj.options[i].text==str){ obj.options[i].selected=true; break; } } }</script></head><body onload="PageInit()"><select name="sex" id="sex"><option value="女"><a href = www.561.cn>女</a></option><option value="男"><a href = www.561.cn>男</a></</option></select></body></html>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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