<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=300;//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; } else { remainingchars_el.innerHTML = "<font color=red>" + (-num_remaining + '') + " characters over</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> <<B>Group description</B><BR><TEXTAREA id=desc onkeydown=GC_UpdateCharCount() onkeyup=GC_UpdateCharCount() onblur="isOver(this);"style="WIDTH: 99%" name=desc rows=4 cols=50></TEXTAREA> <BR>Letters remaining: <SPAN id=remainingchars> <SCRIPT language=javascript1.2><!-- GC_UpdateCharCount(); //--></SCRIPT></SPAN><NOSCRIPT>300 characters allowed </NOSCRIPT> </body> </html>
|