自定义事件触发问题--在线等急急急急急

在list页面预加载详细内容页，然后通过自定义事件触发，但是详细页面会多次触发事件
list.html 页面代码如下

mui.preload({  
        id:"project_detail",  
        url:"../detail/pjdetail.html"  
    });  

var detailPage = null;  
        if (!detailPage) {  
            detailPage = plus.webview.getWebviewById("project_detail");  
        }  
        mui.fire(detailPage, 'loadDetail',{  
            id:id  
        });  
        detailPage.show("slide-in-right", 300);

详细页面代码如下

function onPlusReady() {  
    document.addEventListener('loadDetail', function(e) {  
        console.log("project detail page is fired loadDetail and the id is " + e.detail.id);  
    });  
}  
if (window.plus) {  
    onPlusReady();  
} else {  
    document.addEventListener('plusready', onPlusReady, false);  
}