js关闭当前页面

function CloseWebPage() {     
		    if (navigator.userAgent.indexOf("MSIE") > 0) {     
		        if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {     
		            window.opener = null; window.close();     
		        }     
		        else {     
		            window.open('', '_top'); window.top.close();     
		        }     
		    }     
		    else if (navigator.userAgent.indexOf("Firefox") > 0) {     
		        window.location.href = 'about:blank '; //火狐默认状态非window.open的页面window.close是无效的    
		        //window.history.go(-2);     
		    }     
		    else {     
		        window.opener = null;      
		        window.open('', '_self', '');     
		        window.close();     
		    }     
		}