Experimental Physics and
Industrial Control System

Tom Pelaia <[email protected]> · Fri, 12 Dec 2008 08:33:29 -0500

Hi,
What is the type and the value of "values" when you are attempting
this operation? The "values" variable is either a scalar or an array
depending on the number of items returned by the PV. Then you need to
consider the native type of the PV. If the native type is a number
then you need to convert it to a string in order to use the "indexOf"
method. I suspect that your PV may be returning a number which is why
the indexOf method fails. You might try looking in your web browser's
JavaScript console log to see if there are any errors.
To test for an array, check whether values.length is defined.
To get the type, use the "typeof" method as in "typeof(values)".
best regards,
tom

On Dec 11, 2008, at 8:18 PM, Bao Chunlei wrote:
Hello all,

I just use WebCA to read pv value.But when I do some change to
the value,I get nothing.If anyone has the answer,please tell me.
the code：

function handleMonitor( userInfo, pvName, values, status, severity,
timestamp ) {

userInfo.innerHTML = values;

}

only this,is run correct.
but

function handleMonitor( userInfo, pvName, values, status,
severity, timestamp ) {

temp=values;

index=0;

index=temp.indexOf(".");

userInfo.innerHTML = temp.substr(0,index+4);

}

I get nothing value。
Thanks all
Baochunlei
Control Group,IHEP

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System