在netscape6里如何屏蔽空格

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<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<script>
function OnKeyUp(obj)
{
  obj.value = obj.value.replace(/ /g, "");
}
</script>
<BODY>
<input type="text" name="MyText" id="MyText" onkeyup="OnKeyUp(this);">
</BODY>
</HTML>