2 js solutions to clean nasty MS Word HTML pasted in any CMS + 2 server-side tips

MSWordHtmlCleaners.js

var CleanWordHTML = function ( str )
{
str = str.replace(/<o:p>\s*<\/o:p>/g, "") ;
str = str.replace(/<o:p>.*?<\/o:p>/g, "&nbsp;") ;
str = str.replace( /\s*mso-[^:]+:[^;"]+;?/gi, "" ) ;
str = str.replace( /\s*MARGIN: 0cm 0cm 0pt\s*;/gi, "" ) ;
str = str.replace( /\s*MARGIN: 0cm 0cm 0pt\s*"/gi, "\"" ) ;
str = str.replace( /\s*TEXT-INDENT: 0cm\s*;/gi, "" ) ;
str = str.replace( /\s*TEXT-INDENT: 0cm\s*"/gi, "\"" ) ;
str = str.replace( /\s*TEXT-ALIGN: [^\s;]+;?"/gi, "\"" ) ;
str = str.replace( /\s*PAGE-BREAK-BEFORE: [^\s;]+;?"/gi, "\"" ) ;
str = str.replace( /\s*FONT-VARIANT: [^\s;]+;?"/gi, "\"" ) ;
str = str.replace( /\s*tab-stops:[^;"]*;?/gi, "" ) ;
str = str.replace( /\s*tab-stops:[^"]*/gi, "" ) ;
str = str.replace( /\s*face="[^"]*"/gi, "" ) ;
str = str.replace( /\s*face=[^ >]*/gi, "" ) ;
str = str.replace( /\s*FONT-FAMILY:[^;"]*;?/gi, "" ) ;
str = str.replace(/<(\w[^>]*) class=([^ |>]*)([^>]*)/gi, "<$1$3") ;
str = str.replace( /<(\w[^>]*) style="([^\"]*)"([^>]*)/gi, "<$1$3" ) ;
str = str.replace( /\s*style="\s*"/gi, '' ) ; 
str = str.replace( /<SPAN\s*[^>]*>\s*&nbsp;\s*<\/SPAN>/gi, '&nbsp;' ) ; 
str = str.replace( /<SPAN\s*[^>]*><\/SPAN>/gi, '' ) ; 
str = str.replace(/<(\w[^>]*) lang=([^ |>]*)([^>]*)/gi, "<$1$3") ; 
str = str.replace( /<SPAN\s*>(.*?)<\/SPAN>/gi, '$1' ) ; 
str = str.replace( /<FONT\s*>(.*?)<\/FONT>/gi, '$1' ) ;
str = str.replace(/<\\?\?xml[^>]*>/gi, "") ; 
str = str.replace(/<\/?\w+:[^>]*>/gi, "") ; 
str = str.replace( /<H\d>\s*<\/H\d>/gi, '' ) ;
str = str.replace( /<H1([^>]*)>/gi, '' ) ;
str = str.replace( /<H2([^>]*)>/gi, '' ) ;
str = str.replace( /<H3([^>]*)>/gi, '' ) ;
str = str.replace( /<H4([^>]*)>/gi, '' ) ;
str = str.replace( /<H5([^>]*)>/gi, '' ) ;
str = str.replace( /<H6([^>]*)>/gi, '' ) ;
str = str.replace( /<\/H\d>/gi, '<br>' ) ; //remove this to take out breaks where Heading tags were 
str = str.replace( /<(U|I|STRIKE)>&nbsp;<\/\1>/g, '&nbsp;' ) ;
str = str.replace( /<(B|b)>&nbsp;<\/\b|B>/g, '' ) ;
str = str.replace( /<([^\s>]+)[^>]*>\s*<\/\1>/g, '' ) ;
str = str.replace( /<([^\s>]+)[^>]*>\s*<\/\1>/g, '' ) ;
str = str.replace( /<([^\s>]+)[^>]*>\s*<\/\1>/g, '' ) ;
//some RegEx code for the picky browsers
var re = new RegExp("(<P)([^>]*>.*?)(<\/P>)","gi") ;
str = str.replace( re, "<div$2</div>" ) ;
var re2 = new RegExp("(<font|<FONT)([^*>]*>.*?)(<\/FONT>|<\/font>)","gi") ; 
str = str.replace( re2, "<div$2</div>") ;
str = str.replace( /size|SIZE = ([\d]{1})/g, '' ) ;
return str ;
}



var cleanPaste = function(html) {
    // Run the standard YUI cleanHTML method
    html = this.Editor.cleanHTML(html);

    // Remove additional MS Word content
    html = html.replace(/<(\/)*(\\?xml:|meta|link|span|font|del|ins|st1:|[ovwxp]:)((.|\s)*?)>/gi, ''); // Unwanted tags
    html = html.replace(/(class|style|type|start)=("(.*?)"|(\w*))/gi, ''); // Unwanted sttributes
    html = html.replace(/<style(.*?)style>/gi, '');   // Style tags
    html = html.replace(/<script(.*?)script>/gi, ''); // Script tags
    html = html.replace(/<!--(.*?)-->/gi, '');        // HTML comments
    
    return html;
}

// tip  #1, curl-based : curl -d html=<Dirty HTML> http://wordoff.org/api/clean
// tip  #2, php-based: http://php.net/manual/fr/book.tidy.php