<style>
#abc {
display: none;
}
</style>
<script>
$(document).ready(function() {
$("#<portlet:namespace />def").change(function(){
var id = $(this).find("option:selected").attr("id");
switch (id){
case "area":
$("#abc").css({display: "block"});
break;
case "neu":
$("#eai").css('font-weight', 'bold');
break;
}
});
});
</script>
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