1、打开注册表
2、HKEY_LOCAL_MACHINE
3、HKEY_LOCAL_MACHINE\SOFTWARE
4、HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{648A5600-2C6E-101B-82B6-000000000014}
其键值Compatibility Flags改成0（原是400）
<html><head> <title>JavaScript串口测试</title> <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> <SCRIPT ID=clientEventHandlersJS LANGUAGE=javascript> <!-- function MSComm1_OnComm() { switch(MSComm1.CommEvent) { case 1:{ window.alert("Send OK！"); break;} //发送事件 case 2: { Receive();break;} //接收事件 default: alert("Event Raised!" MSComm1.CommEvent);; } } //--> </SCRIPT> <SCRIPT LANGUAGE=javascript FOR=MSComm1 EVENT=OnComm> <!-- // MSComm1控件每遇到 OnComm 事件就调用 MSComm1_OnComm()函数 MSComm1_OnComm(); //--> </SCRIPT> <script language="JavaScript" type="text/JavaScript"> <!-- String.prototype.Blength = function() { var arr = this.match(/[^\x00-\xff]/ig); return arr == null ? this.length : this.length arr.length; } function OperatePort() { if(MSComm1.PortOpen==true) { try { MSComm1.PortOpen=false; document.getElementById("OperateButton").value="打开串口"; } catch(ex) { alert(ex.message); } } else { try { MSComm1.PortOpen=true; document.getElementById("OperateButton").value="关闭串口"; } catch(ex) { alert(ex.message); } } } function ConfigPort() { if(MSComm1.PortOpen==false) { try { MSComm1.CommPort=document.getElementById("ComName").value; MSComm1.Settings=document.getElementById("BaudRate").value.toString() "," document.getElementById("CheckBit").value.toString() "," document.getElementById("DataBits").value.toString() "," document.getElementById("StopBits").value.toString(); MSComm1.OutBufferCount =0; //清空发送缓冲区 MSComm1.InBufferCount = 0; //滑空接收缓冲区 alert("已配置串口COM" MSComm1.CommPort "\n 参数:" MSComm1.Settings); } catch(ex) { alert(ex.message); } } else { alert("请先关闭串口后再设置！"); } } function Send() { //alert(document.getElementById("txtSend").value); var orgstr=document.getElementById("txtSend").value; var newstr=""; var hexflag=document.getElementById("isSendHex").checked; if(hexflag&&orgstr!="") { if(orgstr.substr(0,2)=="0x"||orgstr.substr(0,2)=="0X") { orgstr=orgstr.substring(2,orgstr.length); } if(orgstr.length%2!=0) { orgstr="0" orgstr; } if((newstr=str2hex(orgstr,16))=="") { alert("错误的16进制数");return false; } } try { MSComm1.Output=hexflag?newstr:orgstr; } catch(ex) { alert(ex.message); } } function Receive() { document.getElementById("txtReceive").value = MSComm1.Input; } function ClearReceived() { document.getElementById("txtReceive").innerText=""; } --> </script></head><body><form name="form1"> <fieldset style="width:200px;height:250px;text-align:center;"> <legend>配置串口</legend> <div style="float:left;width:200px"> <br/> <span>串口号:</span> <select name="ComName" id="ComName" style="width:75px" > <option value="1" >COM1</option> <option value="2" >COM2</option> <option value="3" selected >COM3</option> <option value="4" >COM4</option> </select> <br/> <span>波特率:</span> <select name="BaudRate" id="BaudRate" style="width:75px" > <option value="9600" selected >9600</option> <option value="57600" >57600</option> <option value="115200" >115200</option> </select> <br/> <span>校验位:</span> <select name="CheckBit" id="CheckBit" style="width:75px" > <option value="N" selected >无NONE</option> <option value="O" >奇ODD</option> <option value="E" >偶EVEN</option> </select> <br/> <span>数据位:</span> <input type=text id="DataBits" name="DataBits" value=8 style="width:75px;height:20px"> <br/> <span>停止位:</span> <input type=text id="StopBits" name="StopBits" value=1 style="width:75px;height:20px"> <br/> <br/> <input type="button" id="ConfigButton" style="width:80px;height:30px;font-size:13px" name="ConfigButton" value="配置串口" onClick="ConfigPort()"> <input type="button" id="OperateButton" style="width:80px;height:30px;font-size:13px" name="OperateButton" value="打开串口" onClick="OperatePort()"> </div> </fieldset> <fieldset style="width:200px;height:250px;text-align:center;"> <legend>发送区域</legend> <div style="float:left;"> <textarea id="txtSend" name="txtSend" style="width:200px;height:160px"></textarea> <br/> <span><input id="isSendHex" name="isSendHex" type="checkbox" checked="0" />16进制</span> <input type="button" id="SendButton" style="width:100px;height:30px" name="SendButton" value="发送" onClick="Send()"> </div> </fieldset> <fieldset style="width:200px;height:250px;text-align:center;"> <legend>接收区域</legend> <div style="float:left;"> <textarea id="txtReceive" READONLY=TRUE name="txtReceive" style="width:200px;height:160px"></textarea> <br/> <span><input id="isReceiveHex" name="isReceiveHex" type="checkbox" />16进制</span> <input type="button" id="ClearButton" style="width:100px;height:30px" name="ClearButton" value="清空" onClick="ClearReceived()"> </div> </fieldset></form><OBJECT ID="MSComm1" WIDTH=100 HEIGHT=51 type="application/x-oleobject" CLASSID="CLSID:648A5600-2C6E-101B-82B6-000000000014" CODEBASE="MSCOMM32.OCX"> <PARAM NAME="_ExtentX" VALUE="2646"> <PARAM NAME="_ExtentY" VALUE="1323"> <PARAM NAME="_Version" VALUE="393216"> <PARAM NAME="DTREnable" VALUE="-1"> <PARAM NAME="RThreshold" VALUE="1"> <PARAM NAME="RTSEnable" VALUE="-1"></OBJECT></body></html>
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