rem: jsMath.hidden.innerHTML = '<span><img src="'+jsMath.blank+'" style="height: 2em" /></span>'; 
add: jsMath.hidden.innerHTML = '<span><span style="'+this.block+';height:2em;width:1px"></span></span>'; 
context:   TestSpanHeight: function () {    jsMath.hidden.innerHTML = '<span><img src="'+jsMath.blank+'" style="height: 2em" /></span>';    var span = jsMath.hidden.firstChild;    var img  = span.firstChild;    this.spanHeightVaries = (span.offsetHeight == img.offsetHeight);    jsMath.hidden.innerHTML = '';  },
meta: 6019	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6019/a844e1ec626c2b970c32377c4ad06bb088afa9bd/jsMath.js/buggy/htdocs/jsMath/uncompressed/jsMath.js