Chrome extension send value popup to contentscript

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extension

chrome

I am trying to develop a chrome extension and i want to execute some method in the content script file from my another js file (popup.js). The documentation page says, i can execute the whole script page like this

chrome.tabs.executeScript(null, {file: "content_script.js"});

But I wrote my statements in a function and it is available in my content_script.js file. I want to call the function (and pass some parameter values to it) instead of executing the content_Script as it is. I could not find any documentation about it. Is this possible ?

My Extension = Slider changes page info.
$("#slider").bind("valuesChanged", function(e, data) {
//console.log("Something moved. min: " + data.values.min + " max: " + data.values.max);

});

What I have tried:

I have worked for 1 week. I searched web source but I don't any thing.

I want to send slider bar's value to content script. [This value will inject current page.]