greasmonkey / chrome - userscript -shows important SEO head information

seo.user.js

// ==UserScript==
// @name          shows important SEO head information
// @namespace     http://www.facesaerch.com/
// @description   show canonical, noindex, nofollow
// @include       *
// ==/UserScript==

function trim12 (str) {
	var	str = str.replace(/^\s\s*/, ''),
		ws = /\s/,
		i = str.length;
	while (ws.test(str.charAt(--i)));
	return str.slice(0, i + 1);
}


var allElements, thisElement;
allElements = document.getElementsByTagName('link');
var mybody, newElement, newElement2;
mybody = document.getElementsByTagName('body');



for (var i = 0; i < allElements.length; i++) {
    thisElement = allElements[i];
    if(thisElement.getAttribute('rel')=='canonical')
    {
      
    	

if (mybody[0]) {

	if(thisElement.getAttribute('href')!=document.location)
	{
		bg="yellow";
		bor="red";
		c="blue";
		var link = true;
	}
	else
	{
		bg="lightyellow";
		bor="gray";
		c="black";
		
		var link = false;
	}
    newElement = document.createElement('div');
    newElement.setAttribute('id', 'canonicaldebug');
    newElement.setAttribute('style', 'position:fixed; left:5px; top:5px; z-index: 9999999; border: 1px solid '+bor+'; background-color: '+bg+'; padding: 2px; font: 9px arial; color: '+c+'";');
    if(link==true)
    {
    	newElement.innerHTML="<a href='"+thisElement.getAttribute('href')+"' style='color:blue;' >"+thisElement.getAttribute('href')+"</a>";
    }
    else
    {
   	 newElement.innerHTML=thisElement.getAttribute('href');
   	}

    mybody[0].parentNode.insertBefore(newElement, mybody[0]);

}
    }
}

//robotsS
allMeta = document.getElementsByTagName('meta');
var rc='';
for (var i = 0; i < allMeta.length; i++)
{
	
    thisElement = allMeta[i];
     if(thisElement.getAttribute('name')=='robots')
     {
     	
     	rc=rc+' '+thisElement.getAttribute('content');
     	
    }
    else if(thisElement.getAttribute('name')=='googlebot')
     {
     	
     	rc=rc+' '+thisElement.getAttribute('content');
     }
}

rc=trim12(rc);
if(rc!='')
    {
    //alert(rc);
    	newElement2 = document.createElement('div');
     	if((rc.search('noindex')!=-1)|(rc.search('nofollow')!=-1))
     	{
     				bg="yellow";
					bor="red";
					c="blue";
					//alert(rc.search('noindex'));
     	}
     	else
     	{
     				bg="lightyellow";
					bor="gray";
					c="black";
     	}
     	
     	if(document.getElementById('canonicaldebug'))
     	{
     		toppx="25";
     	}
     	else
     	{
     		toppx="5";
     	}
        newElement2.setAttribute('style', 'position:fixed; left:5px; top:'+toppx+'px; z-index: 9999999; border: 1px solid '+bor+'; background-color: '+bg+'; padding: 2px; font: 9px arial; color: '+c+' !important";');
   	 	newElement2.innerHTML=rc;
   		document.body.parentNode.insertBefore(newElement2, mybody[0]);
    }