查看文章 |
js loading效果
2008年09月21日 星期日 下午 04:35
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>无标题文档</title> </head> <BODY STYLE="FONT-SIZE: 10pt; FONT-FAMILY: Verdana, Arial, Helvetica"> <SCRIPT LANGUAGE="JScript"> var NUMBER_OF_REPETITIONS = 40; var nRepetitions = 0; var g_oTimer = null; function startLongProcess() { divProgressDialog.style.display = ""; resizeModal(); btnCancel.focus(); // Add a resize handler for the window window.onresize = resizeModal; // Add a warning in case anyone tries to navigate away or refresh the page window.onbeforeunload = showWarning; // // Here's where you would normally kick off a long asynchronous process // like a file download or a remote database operation. Here, we use // our "long process" to simulate this process. // continueLongProcess(); } function updateProgress(nNewPercent) { // Update our pseudo progress bar divProgressInner.style.width = (parseInt(divProgressOuter.style.width) * nNewPercent / 100)+ "px"; } function stopLongProcess() { if (g_oTimer != null) { // Clear the timer so we don't get called back an extra time window.clearTimeout(g_oTimer); g_oTimer = null; } // Hide the fake modal DIV divModal.style.width = "0px"; divModal.style.height = "0px"; divProgressDialog.style.display = "none"; // Remove our event handlers window.onresize = null; window.onbeforeunload = null; nRepetitions = 0; } function continueLongProcess() { if (nRepetitions < NUMBER_OF_REPETITIONS) { // Set the timeout somewhere between 0 and .25 seconds var nTimeoutLength = Math.random() * 250; updateProgress(100 * nRepetitions / NUMBER_OF_REPETITIONS); g_oTimer = window.setTimeout("continueLongProcess();", nTimeoutLength); nRepetitions++; } else { stopLongProcess(); } } function showWarning() { //Warn users before they refresh the page or navigate away return "Navigating to a different page or refreshing the window could cause you to lose precious data.nnAre you*absolutely* certain you want to do this?"; } function resizeModal() { // Resize the DIV which fakes the modality of the dialog DIV divModal.style.width = document.body.scrollWidth; divModal.style.height = document.body.scrollHeight; // Re-center the dialog DIV divProgressDialog.style.left = ((document.body.offsetWidth - divProgressDialog.offsetWidth) / 2); divProgressDialog.style.top = ((document.body.offsetHeight - divProgressDialog.offsetHeight) / 2); } </SCRIPT> <INPUT TYPE="BUTTON" VALUE="Click Me!" onclick="startLongProcess();"> <!-- BEGIN PROGRESS DIALOG --> <DIV STYLE="BORDER: buttonhighlight 2px outset; FONT-SIZE: 8pt; Z-INDEX: 4; FONT-FAMILY: Tahoma; POSITION: absolute; BACKGROUND-COLOR: buttonface; DISPLAY: none; WIDTH: 350px; CURSOR: default" ID="divProgressDialog" onselectstart="window.event.returnValue=false;"> <DIV STYLE="PADDING: 3px; FONT-WEIGHT: bolder; COLOR: captiontext; BORDER-BOTTOM: white 2px groove; BACKGROUND-COLOR: activecaption"> Downloading Requested Document </DIV> <DIV STYLE="PADDING: 5px"> Please wait while I download the document you requested. </DIV> <DIV STYLE="PADDING: 5px"> This may take several seconds. </DIV> <DIV STYLE="PADDING: 5px"> <DIV ID="divProgressOuter" STYLE="BORDER: 1px solid threedshadow; WIDTH: 336px; HEIGHT: 15px"> <DIV ID="divProgressInner" STYLE="COLOR: white; TEXT-ALIGN: center; BACKGROUND-COLOR: infobackground; MARGIN: 0px; WIDTH: 0px; HEIGHT: 13px;"></DIV> </DIV> </DIV> <DIV STYLE="BORDER-TOP: white 2px groove; PADDING-BOTTOM: 5px; PADDING-TOP: 3px; BACKGROUND-COLOR: buttonface; TEXT-ALIGN: center"> <INPUT STYLE="FONT-FAMILY: Tahoma; FONT-SIZE: 8pt" TYPE="button" ID="btnCancel" onclick="stopLongProcess();" VALUE="Cancel"> </DIV> </DIV> <!-- END PROGRESS DIALOG --> <!-- BEGIN FAKE MODAL DIV--> <DIV ID="divModal" STYLE="BACKGROUND-COLOR: white; FILTER: alpha(opacity=75); LEFT: 0px; POSITION: absolute; TOP: 0px; Z-INDEX: 3" onclick="window.event.cancelBubble=true; window.event.returnValue=false;"> </DIV> <!-- END FAKE MODAL DIV --> </body> </html><script language="JavaScript" ></script> 发布人：杨少锋 昵称：依凡视觉 QQ：392225453 Email:qq198911510@126.com 网站制作 网站承建 网站优化 空间域名 |
最近读者：
