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var VMLCSS = 'behavior:url(#default#VML);display:inline-block;position:absolute;left:0px;top:0px;';
var styleSheet, styledTags = {}, styleTag = function(tag){
if (styleSheet) styledTags[tag] = styleSheet.addRule('av\\:' + tag, VMLCSS);
};
exports.init = function(document){
var namespaces;
try { // IE9 workaround: sometimes it throws here
namespaces = document.namespaces;
} catch (e) {
}
if (!namespaces) return false;
namespaces.add('av', 'urn:schemas-microsoft-com:vml');
namespaces.add('ao', 'urn:schemas-microsoft-com:office:office');
styleSheet = document.createStyleSheet();
styleSheet.addRule('vml', 'display:inline-block;position:relative;overflow:hidden;');
/* styleTag('skew');
styleTag('fill');
styleTag('stroke');
styleTag('path');
styleTag('textpath');
styleTag('group');*/
styleTag('vml');
return true;
};
exports.createElement = function(tag){
if (!(tag in styledTags)) styleTag(tag);
return document.createElement('av:' + tag);
};
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