colourblind.js

javascript:(function(){var s=document.getElementById("colourblind-styling");var x=document.getElementById("colourblind-filters");if(!s){s=document.createElement("style");document.body.appendChild(s)}if(!x){x=document.createElement("div");x.setAttribute("style","height: 0; padding: 0; margin: 0; line-height: 0;");x.innerHTML='<svg id="colorblind-filters" style="display: none"> <defs> <filter id="protanopia"> <feColorMatrix type="matrix" values="0.567,0.433,0,0,0 0.558,0.442,0,0,0 0 0.242,0.758,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="protanomaly"> <feColorMatrix type="matrix" values="0.817,0.183,0,0,0 0.333,0.667,0,0,0 0,0.125,0.875,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="deuteranopia"> <feColorMatrix type="matrix" values="0.625,0.375,0,0,0 0.7,0.3,0,0,0 0,0.3,0.7,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="deuteranomaly"> <feColorMatrix type="matrix" values="0.8,0.2,0,0,0 0.258,0.742,0,0,0 0,0.142,0.858,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="tritanopia"> <feColorMatrix type="matrix" values="0.95,0.05,0,0,0 0,0.433,0.567,0,0 0,0.475,0.525,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="tritanomaly"> <feColorMatrix type="matrix" values="0.967,0.033,0,0,0 0,0.733,0.267,0,0 0,0.183,0.817,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="achromatopsia"> <feColorMatrix type="matrix" values="0.299,0.587,0.114,0,0 0.299,0.587,0.114,0,0 0.299,0.587,0.114,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> <filter id="achromatomaly"> <feColorMatrix type="matrix" values="0.618,0.320,0.062,0,0 0.163,0.775,0.062,0,0 0.163,0.320,0.516,0,0 0,0,0,1,0" in="SourceGraphic" /> </filter> </defs> </svg>';document.body.appendChild(x)}var l=["protanopia","protanomaly","deuteranopia","deuteranomaly","tritanopia","tritanomaly","achromatopsia","achromatomaly"];var p="";for(var i in l)p+=parseInt(i)+1+": "+l[i]+"; ";var c=parseInt(prompt("0: off; "+p))-1;if(isNaN(c))return;if(c>=l.length)return;if(c==-1){s.innerHTML="body{-webkit-filter:none;-moz-filter:none;-ms-filter:none;-o-filter:none;filter:none;}";return}c=l[c];if(document.getElementById(c))s.innerHTML="body{-webkit-filter:!!;-moz-filter:!!;-ms-filter:!!;-o-filter:!!;filter:!!;}".replace(/!!/g,"url(#"+c+")");else s.innerHTML="body{-webkit-filter:none;-moz-filter:none;-ms-filter:none;-o-filter:none;filter:none;}"})();