<DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Untitled Document</title>
<SCRIPT language=javascript1.3><!--
var testleng=30;//允许多少字符串填入
function GC_UpdateCharCount() {
var desc_el = document.getElementById('desc');
var remainingchars_el = document.getElementById('remainingchars');
var num_remaining = testleng - desc_el.value.length;
if (num_remaining >= 0) {
remainingchars_el.innerHTML = num_remaining;
document.getElementById('num').style.display = "";
} else {
document.getElementById('num').style.display = "none";
remainingchars_el.innerHTML = "超出的字数: " + "<font color=red>"+
(-num_remaining + '') + "</font>";
}
}
function isOver(sText)
{
var intlen=sText.value.length;
if (intlen>testleng)
{
alert("描述特征的内容的字数必修小于或者等于 "+testleng);
sText.focus();
sText.select();
}
}
//--></SCRIPT>
</head>
<body>
<TEXTAREA id=desc onkeydown=GC_UpdateCharCount() onkeyup=GC_UpdateCharCount() onblur="isOver(this);" name=desc rows=4 cols=40></TEXTAREA>
<BR><table><tr><td id="num">还剩下的字数:</td><td><SPAN id=remainingchars>
<SCRIPT language=javascript1.2><!--
GC_UpdateCharCount();
//--></SCRIPT></SPAN></td></tr></table>
</body>
</html>
posted on 2006-07-24 11:21
fish的Blog 阅读(313)
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