JavaScript定时器演示

来源：步遥情感网

<html> 
<head> 
<script type="text/javascript"> 
var g_percentFlag; 
var g_percent = 0; 
var g_count = 0; 
function intervalPercent(path) { 
 g_count += 1; 
 document.getElementById("msg3").value = g_count; 
 if (g_percent < 100) { 
 g_percent += 20; 
 document.getElementById("msg2").value = g_percent + "%"; 
 } else if (g_percent == 100) { 
 document.getElementById("msg2").value = g_percent + "%"; 
 clearInterval(g_percentFlag); 
 g_percent = 0; 
 } else { 
 document.getElementById("msg2").value = "Error."; 
 } 
} 
 
function getPercentage(path){ 
 g_percentFlag = setInterval("intervalPercent(\"" + path + "\")", 200); 
} 
</script> 
</head> 
 
<body> www.2cto.com
<!-- <input type="button" value="click" onclick="a=" /> --> 
<input id="msg2" type="text" /><br /> 
<input id="msg3" type="text" /><br /> 
<script> 
 getPercentage("Hello!"); 
</script> 
<input type="text" value="nothing" /> 
<input type="button" value="click" /> 
</body> 
</html>

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