Feature #2132 - Suppressing a javascrit error.

main/inc/lib/asciimath/ASCIIMathML.js

@@ -4628,6 +4628,12 @@ function displayCoord(evt) {
     var nl = svgroot.childNodes;
     for (var i=0; i<nl.length && nl.item(i).nodeName!="text"; i++);
     var cnode = nl.item(i);
+    // Added by Ivan Tcholakov, 08-JAN-2011.
+    // Suppresing a javasript error that occurs on Opera 11.
+    if (typeof cnode != 'object') {
+        return;
+    }
+    //
     cnode.mtext = mtext;
     cnode.mtext([svgroot.getAttribute("width")-(-7),svgroot.getAttribute("height")-7],"("+getX(evt).toFixed(2)+", "+getY(evt).toFixed(2)+")", "left", "", "11");
 /*    var dnode = nl.item(i+1);