code: function hstyle(st) {
  			// Prepare string
  			var s = '';
  			for (var key in st) {
  				s += '<' + key;
  				for (var attr in st[key]) {
  					s += ' ';
  					if (attr.substr(0, 2) == 'x:') {
  						s += attr;
  					} else {
  						s += 'ss:';
  					}
  					s += attr + '="' + st[key][attr] + '"';
  				}
  				s += '/>';
  			}
  
  			var hh = hash(s);
  			// Store in hash
  			if (styles[hh]) {
  			} else {
  				styles[hh] = {styleid: stylesn};
  				s2 += '<Style ss:ID="s' + stylesn + '">';
  				s2 += s;
  				s2 += '</Style>';
  				stylesn++;
  			}
  			return 's' + styles[hh].styleid;
  		}
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