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dpavlin |
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// google.js |
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// Google Highlighter |
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// Copyright(C)2001 - 2003 |
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// Cal Henderson <cal@iamcal.com> |
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// |
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// Thanks to Ian Beveridge for bugfixes |
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// |
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// This code may be freely redistributed, |
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// providing this message remains intact. |
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// |
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var google_text_color = '#000000'; |
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var google_link_colors = new Array('#ffff66','#a0ffff','#99ff99','#ff9999','#ff66ff'); |
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function init_google(){ |
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var pattern = /google\./i; |
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if (pattern.exec(document.referrer) != null){ |
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var url_parts = document.referrer.split('?'); |
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if (url_parts[1]){ |
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var url_args = url_parts[1].split('&'); |
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for(var i=0; i<url_args.length; i++){ |
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var keyval = url_args[i].split('='); |
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if (keyval[0] == 'q'){ |
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go_google(decode_url(keyval[1])); |
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return; |
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} |
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} |
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} |
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} |
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} |
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function decode_url(url){ |
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return unescape(url.replace(/\+/g,' ')); |
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} |
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function go_google(terms){ |
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terms = terms.replace(/\"/g,""); |
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var terms_split = terms.split(' '); |
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var c = 0; |
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for(var i=0; i<terms_split.length; i++){ |
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highlight_goolge(terms_split[i], document.body,google_link_colors[c]); |
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c = (c == google_link_colors.length-1)?0:c+1; |
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} |
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} |
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function highlight_goolge(term, container, color){ |
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var term_low = term.toLowerCase(); |
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for(var i=0; i<container.childNodes.length; i++){ |
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var node = container.childNodes[i]; |
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if (node.nodeType == 3){ |
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var data = node.data; |
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var data_low = data.toLowerCase(); |
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if (data_low.indexOf(term_low) != -1){ |
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//term found! |
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var new_node = document.createElement('SPAN'); |
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node.parentNode.replaceChild(new_node,node); |
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var result; |
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while((result = data_low.indexOf(term_low)) != -1){ |
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new_node.appendChild(document.createTextNode(data.substr(0,result))); |
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new_node.appendChild(create_node_google(document.createTextNode(data.substr(result,term.length)),color)); |
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data = data.substr(result + term.length); |
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data_low = data_low.substr(result + term.length); |
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} |
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new_node.appendChild(document.createTextNode(data)); |
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} |
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}else{ |
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//recurse |
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highlight_goolge(term, node, color); |
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} |
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} |
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} |
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function create_node_google(child, color){ |
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var node = document.createElement('SPAN'); |
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node.style.backgroundColor = color; |
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node.style.color = google_text_color; |
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node.appendChild(child); |
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return node; |
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} |
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