Hi developers, today I encountered one error which works fine in Mozilla Firefox but giving an error in IE (Internet Explorer). In IE, the error which I encountered is “Error: Invalid source HTML for this operation “, when I run the same application in Firefox, it renders properly without any warnings or errors in the JavaScript console.
I wondered why IE will raise an issue when I could not see any error in Firefox? annoying error right? Yes! same thing I feel.
After searching a lot in Google by this query “Error: Invalid source HTML for this operation“, I got the answer by seeing some forums. This Error might be because of “Inserting a block element inside a non-block element”
like for example: document.getElementById(‘inserting’).innerHTML=”<span><div>Inserting a block element inside a non-block element</div></span>”
The above is strictly not allowed in IE6.0 browsers. When you render the same in IE browser will raise an error saying the same “Error: Invalid source HTML for this operation“, when you render the same in Firefox browsers then will render properly without any error 
You can view the below links for reference:
innerHTML and non-block elements
http://xinha.webfactional.com/ticket/129
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