Wt

hi,

in Wt.js this code pragment:

this.getSelectionRange = function(elem) {
  if (document.selection) { // IE
  ...
        var val = $(elem).val();
        ...
        range.moveEnd("character", val.length);
        ...
  ...

val maybe null(in low probability)

following "val.length" code will throw an exception in IE

and make the programe stop

in my observation,

there is always a WSelectionBox in the page

when this error occur.