html中input输入框屏蔽鼠标右键

<label> 
<input id="ckdestinationId" type="text" oncontextmenu="return false;"  
onpaste="return false;" onkeydown="fncKeyStop(event)"  
name="ckdestinationId"> 
<span class="c1">*</span> 
</label> 

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