{
var cmd_send = "";
var result = $('txtReceive').value;
var results = result.split(',');
for(var i=0;i<results.length;i++)
{
cmd_send += String.fromCharCode(eval(results[i]));
}
if(MSComm1.PortOpen==false)
{
MSComm1.PortOpen=true;
MSComm1.Output=cmd_send;//發送命令
}
else
{
window.alert ("已經開始接收數據!");
}
}
function ClosePort()
{
if(MSComm1.PortOpen==true)
{
MSComm1.PortOpen=false;
}
else
{
window.alert ("串口已經關閉!");
}
}
function SendMessage()
{
var cmd_send = "";
var result = $('txtReceive').value;
var results = result.split(',');
for(var i=0;i<results.length;i++)
{
cmd_send += String.fromCharCode(eval(results[i]));
}
if(MSComm1.PortOpen==false)
{
window.alert ("串口已經關閉!!");
}
else
{
MSComm1.Output=cmd_send;//發送命令
}
}
詳見：
/xuing/article/details/6688306
求采納！！！！！！！！！