Bookmarklet example 2
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{var baseURL='http://steltenpower.com/feColorMatrix.svg';var values;if(location.href.substr(0,baseURL.length)==baseURL){values=document.getElementById('myFilterElement').getAttribute('values');}else{values='';}var defaultValues;if(values===''){defaultValues='1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0';}else{defaultValues=values;}var newValues=prompt('matrix values for feColorMatrix please',defaultValues);if(newValues!=defaultValues){if(values===''){location.assign(baseURL+'?uri='+escape(location.href)+'&values='+escape(newValues)+'&title='+escape(document.title));}else{document.getElementById('myFilterElement').setAttribute('values',newValues);}}})();){kind=link}