function change_yzm()
{document.getElementById('ImgCheckCode').src='/inc/VerifyCode.asp';}
document.write('<form>用户名：<input name="login_username" id="login_username"  maxlength="16" class="input_style" style="width:120px;margin-bottom:3px;" /> &nbsp; 密　码：<input name="login_password" id="login_password"  maxlength="32" class="input_style" type="password" style="width:120px;margin-bottom:3px;" /> &nbsp; 验证码：<input name="VerifyCode" id="VerifyCode" style="width:33px;margin-bottom:7px; text-transform:uppercase;" class="input_style" maxlength="4" /> <img id="ImgCheckCode"  src="/inc/VerifyCode.asp?.7055475" align="absmiddle" title="更换验证码" onclick="this.src=\'/inc/VerifyCode.asp?\'+Math.random();" /> &nbsp; <input  type="submit" value="登 录" class="button_style" /> <span style="margin-left:10px;"><a href="/userReg/">注册</a> &nbsp; <a href="/GetPw/" >忘记密码</a></span></form>');