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<ul><li>输入验证码</li></ul>
<ul><li><input type=text name=code id="code" Datatype='Require' msg='请填写验证码' okmsg="√" value=''  class="input_gr" onblur="if(this.value.replace(/^s+│s+$/g,'')=='')"><input type=hidden name=vcode id="vcode" value='8d2zM23d24K1f27zA8e23xB.f29TM2c9f0E4ec2TK145cxT.e95jP1a6a,E6470VL1326YH.13dVU9c4eXB9a96UB a83UT 25dBQ 474JQ 917HE 4ddOY c17NV 2b4J, 614JQ 1c5OM 02cJM aa9NM 495Gk 9f3CO 84bQE 7e0SN 0a2Rc 996EM '></li></ul>
<ul><li><img id="vcodeimage" name="vcodeimage" src=http://service.club.sohu.com/vcode/vcode.php?vcode=8d2zM23d24K1f27zA8e23xB.f29TM2c9f0E4ec2TK145cxT.e95jP1a6a%2CE6470VL1326YH.13dVU9c4eXB9a96UB+a83UT+25dBQ+474JQ+917HE+4ddOY+c17NV+2b4J%2C+614JQ+1c5OM+02cJM+aa9NM+495Gk+9f3CO+84bQE+7e0SN+0a2Rc+996EM+>
<a onmouseover="this.style.cursor='pointer'" onclick="refreshvc()"style="color:red;">看不清数字?请在刷新一遍</a></li></ul>
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怎么用javascript验证输入框输入的值和后面的图片上的验证码是一样的?请帮忙