JS实现 页面提交防刷新等待提示

 1 //关闭等待窗口  
 2 function closediv() {  
 3     //Close Div   
 4     document.body.removeChild(document.getElementById("bgDiv"));  
 5     document.getElementById("msgDiv").removeChild(document.getElementById("msgTitle"));  
 6     document.body.removeChild(document.getElementById("msgDiv"));  
 7 }  
 8 //显示等待窗口  
 9 function showdiv(str) {  
10     var msgw, msgh, bordercolor;  
11     msgw = 400; //提示窗口的宽度   
12     msgh = 100; //提示窗口的高度   
13     bordercolor = "#336699"; //提示窗口的边框颜色   
14     titlecolor = "#99CCFF"; //提示窗口的标题颜色   
15   
16     var sWidth, sHeight;  
17     sWidth = window.screen.availWidth;  
18     sHeight = window.screen.availHeight;  
19   
20     var bgObj = document.createElement("div");  
21     bgObj.setAttribute(‘id‘, ‘bgDiv‘);  
22     bgObj.style.position = "absolute";  
23     bgObj.style.top = "0";  
24     bgObj.style.background = "#777";  
25     bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";  
26     bgObj.style.opacity = "0.6";  
27     bgObj.style.left = "0";  
28     bgObj.style.width = sWidth + "px";  
29     bgObj.style.height = sHeight + "px";  
30     document.body.appendChild(bgObj);  
31     var msgObj = document.createElement("div")  
32     msgObj.setAttribute("id", "msgDiv");  
33     msgObj.setAttribute("align", "center");  
34     msgObj.style.position = "absolute";  
35     msgObj.style.background = "white";  
36     msgObj.style.font = "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";  
37     msgObj.style.border = "1px solid " + bordercolor;  
38     msgObj.style.width = msgw + "px";  
39     msgObj.style.height = msgh + "px";  
40     msgObj.style.top = (document.documentElement.scrollTop + (sHeight - msgh) / 2) + "px";  
41     msgObj.style.left = (sWidth - msgw) / 2 + "px";  
42     var title = document.createElement("h4");  
43     title.setAttribute("id", "msgTitle");  
44     title.setAttribute("align", "right");  
45     title.style.margin = "0";  
46     title.style.padding = "3px";  
47     title.style.background = bordercolor;  
48     title.style.filter = "progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";  
49     title.style.opacity = "0.75";  
50     title.style.border = "1px solid " + bordercolor;  
51     title.style.height = "18px";  
52     title.style.font = "12px Verdana, Geneva, Arial, Helvetica, sans-serif";  
53     title.style.color = "white";  
54     //title.style.cursor = "pointer";  
55     //title.innerHTML = "关闭";  
56     //title.onclick = closediv;  
57     document.body.appendChild(msgObj);  
58     document.getElementById("msgDiv").appendChild(title);  
59     var txt = document.createElement("p");  
60     txt.style.margin = "1em 0"  
61     txt.setAttribute("id", "msgTxt");  
62     txt.innerHTML = str;  
63     document.getElementById("msgDiv").appendChild(txt);  
64 }  
65 //屏蔽F5  
66 document.onkeydown = mykeydown;  
67 function mykeydown() {  
68     if (event.keyCode == 116) //屏蔽F5刷新键     
69     {  
70         window.event.keyCode = 0;  
71         return false;  
72     }  
73 }