js捕获窗口关闭或刷新事件

window.onbeforeunload = onbeforeunload_handler;//关闭前
	 
		 window.onunload = onunload_handler;//关闭 
	
	    
	    function onbeforeunload_handler(){
		     
	     //  var warning="确认退出?";          
	        return  confirm("确认放弃修改?");  
	    }  
	      
	    function onunload_handler(){  
	        var warning="谢谢光临";  
	        alert(warning);  
	    }  


对于页面刷新的情况也算是关闭窗口

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转载自920198034.iteye.com/blog/2277342