本文實例講述了JSP結(jié)合js實現(xiàn)img中src更新請求的方法。分享給大家供大家參考。具體如下：
1.javascript(更新的函數(shù))
script type="text/javascript">
function changeImage(){
var img = document.getElementById("imgVcode");
if(img.name == 1){
img.name = 2;
img.src = "shop.do?method=registerImage2";
}else if(img.name == 2){
img.name = 1;
img.src = "shop.do?method=registerImage";
}
}
/script>
2.jsp中img和img改變的代碼
td>
img class="yzm_img" id='imgVcode' name="1" src="shop.do?method=registerImage" />
input name="code" type="text" id="txtVerifyCode"
class="yzm_input" onblur="testCode(this)"/>
div class="text_left t1">
p class="t1">
span id="vcodeValidMsg">請輸入圖片中的四個字母。/span>
span id="codeInfo" style="color:red">/span>
a href="#" id="imgchange" onclick="changeImage()">看不清楚？換個圖片/a>
/p>
/div>
/td>
3.后臺action代碼
public ActionForward registerImage(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//將image創(chuàng)建,返回認證碼
response.setContentType("image/jpeg");
OutputStream out = response.getOutputStream();
String strEnsure = shopManager.createImageInfo(50,20,out);
//設(shè)置到session中
request.getSession().setAttribute("strEnsure", strEnsure);
return null;
}
public ActionForward registerImage2(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//將image創(chuàng)建,返回認證碼
response.setContentType("image/jpeg");
OutputStream out = response.getOutputStream();
String strEnsure = shopManager.createImageInfo(50,20,out);
//設(shè)置到session中
request.getSession().setAttribute("strEnsure", strEnsure);
return null;
}
希望本文所述對大家的JavaScript程序設(shè)計有所幫助。
標(biāo)簽：宿州 貴州 江西 西藏 丹東 青島 云浮 紅河
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