JS实现 页面提交防刷新等待提示
系统使用中,常常会遇到网速过慢这样那么的情况,如果你的提交没有做验证或者特殊处理很容易造成重复提交,产生冗余数据或者系统出错。我的解决方法是,页面表单提交时,如果有等待时间,那么页面上会弹出一个提示框告诉用户系统数据正在提交,请耐心等待,同时屏蔽页面,然用户不能继续操作,从而有效方式用户重复提交。
下面就写出这个JS文件:
//关闭等待窗口 function closediv() { //Close Div document.body.removeChild(document.getElementById("bgDiv")); document.getElementById("msgDiv").removeChild(document.getElementById("msgTitle")); document.body.removeChild(document.getElementById("msgDiv")); } //显示等待窗口 function showdiv(str) { var msgw, msgh, bordercolor; msgw = 400; //提示窗口的宽度 msgh = 100; //提示窗口的高度 bordercolor = "#336699"; //提示窗口的边框颜色 titlecolor = "#99CCFF"; //提示窗口的标题颜色 var sWidth, sHeight; sWidth = window.screen.availWidth; sHeight = window.screen.availHeight; var bgObj = document.createElement("div"); bgObj.setAttribute('id', 'bgDiv'); bgObj.style.position = "absolute"; bgObj.style.top = "0"; bgObj.style.background = "#777"; bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75"; bgObj.style.opacity = "0.6"; bgObj.style.left = "0"; bgObj.style.width = sWidth + "px"; bgObj.style.height = sHeight + "px"; document.body.appendChild(bgObj); var msgObj = document.createElement("div") msgObj.setAttribute("id", "msgDiv"); msgObj.setAttribute("align", "center"); msgObj.style.position = "absolute"; msgObj.style.background = "white"; msgObj.style.font = "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif"; msgObj.style.border = "1px solid " + bordercolor; msgObj.style.width = msgw + "px"; msgObj.style.height = msgh + "px"; msgObj.style.top = (document.documentElement.scrollTop + (sHeight - msgh) / 2) + "px"; msgObj.style.left = (sWidth - msgw) / 2 + "px"; var title = document.createElement("h4"); title.setAttribute("id", "msgTitle"); title.setAttribute("align", "right"); title.style.margin = "0"; title.style.padding = "3px"; title.style.background = bordercolor; title.style.filter = "progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);"; title.style.opacity = "0.75"; title.style.border = "1px solid " + bordercolor; title.style.height = "18px"; title.style.font = "12px Verdana, Geneva, Arial, Helvetica, sans-serif"; title.style.color = "white"; //title.style.cursor = "pointer"; //title.innerHTML = "关闭"; //title.onclick = closediv; document.body.appendChild(msgObj); document.getElementById("msgDiv").appendChild(title); var txt = document.createElement("p"); txt.style.margin = "1em 0" txt.setAttribute("id", "msgTxt"); txt.innerHTML = str; document.getElementById("msgDiv").appendChild(txt); } //屏蔽F5 document.onkeydown = mykeydown; function mykeydown() { if (event.keyCode == 116) //屏蔽F5刷新键 { window.event.keyCode = 0; return false; } }
使用页面直接调用这个js文件,然后在按钮的onclick事件中填写:
<INPUT onclick="showdiv('表达数据提交中<br/>请稍候........ <br/> );" type="button" value="提交数据">
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