javascript removing copyright character from text : I am using some regex to remove white spaces from some text in javascript. The current regex looks like this

	var cleaned_plaintext = website_content;

	cleaned_plaintext = cleaned_plaintext.toLowerCase();
	cleaned_plaintext = cleaned_plaintext.replace(/(\0\r\n|\n|\r|\0)/gm," ");
	cleaned_plaintext = cleaned_plaintext.replace(/\s+/g," ");
	cleaned_plaintext = cleaned_plaintext.replace(/[...\(\)]/g,"");
	cleaned_plaintext = cleaned_plaintext.replace(/[…]/g,"");
	cleaned_plaintext = cleaned_plaintext.replace(/[:!?.,={-}]/g," ");
	cleaned_plaintext = cleaned_plaintext.replace(/\s+/g," ");


The above regex does pretty good at cleaning up most white spaces but say I have symbols like these 

    ©

How can I remove those with regex? Also any tips on cleaning up that above regex to make it more streamlined, faster, etc....