support <script for=".." event="..." ...> return;

probably i should have been defined an event handler but anyways

script like below made an illegal return  error
		<script language="javascript" event="oncontextmenu" for="document">
			//<!--
			return NoRightClick()
			//-->
		</script>

didn't do testing i don't know how to do it, don't have time, works in javascript, hope it is ok in coffescript