js中的鼠標右鍵點擊事件

https://www.cnblogs.com/sea-stream/p/9638870.html

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 window.onload = function(){//去掉默認的contextmenu事件，否則會和右鍵事件同時出現。document.oncontextmenu = function(e){e.preventDefault();};document.getElementById("test").onmousedown = function(e){if(e.button ==2){alert("你點了右鍵");}else if(e.button ==0){alert("你點了左鍵");}else if(e.button ==1){alert("你點了滾輪");}}
}

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