<script type="text/javascript"> function a(){ var s = document.forms[0].txt.value; var re = /\,/g; var a = s.match(re); if(a.length>10) alert("大于10"); else alert("OK"); } </script> </head> <form> <input type="button" value="click" onclick="a()"> <input type="text" name="txt" value=",,,,,x,,"> </form>
var s="a,b,c,d,e,f,g"; var len=s.split(",").length; alert(len);
var s="a,b,c,d,e,f,g"; var len=s.split(",").length; if(len>10) alert(len);
<html> <head> <script lanague="javascript"> function FindCharCode(){ var testStr="ABC,DEF,GH,I,JK"; var count=0; for(var i=0;i<testStr.length;i++){ if(testStr.charAt(i)==',') count++; } alert(count); }</script> </head> <body> <input id="df" value="OK" onclick="FindCharCode();" type="button"/> </body> <html>
var s="a,b,c,d,e,f,g"; var len=s.split(",").length; if(len>10) alert(len);
3楼 len-1应该等于字符串中 ,的个数吧
function a(){ var s = document.forms[0].txt.value; var re = /\,/g; var a = s.match(re); if(a.length>10) alert("大于10"); else alert("OK");
<script type="text/javascript">
function a(){
var s = document.forms[0].txt.value;
var re = /\,/g;
var a = s.match(re);
if(a.length>10) alert("大于10");
else alert("OK");
}
</script>
</head>
<form>
<input type="button" value="click" onclick="a()">
<input type="text" name="txt" value=",,,,,x,,">
</form>
var s="a,b,c,d,e,f,g";
var len=s.split(",").length;
alert(len);
var s="a,b,c,d,e,f,g";
var len=s.split(",").length;
if(len>10)
alert(len);
<head>
<script lanague="javascript">
function FindCharCode(){
var testStr="ABC,DEF,GH,I,JK";
var count=0;
for(var i=0;i<testStr.length;i++){
if(testStr.charAt(i)==',')
count++;
}
alert(count);
}</script>
</head>
<body>
<input id="df" value="OK" onclick="FindCharCode();" type="button"/>
</body>
<html>
var s="a,b,c,d,e,f,g";
var len=s.split(",").length;
if(len>10)
alert(len);
var s = document.forms[0].txt.value;
var re = /\,/g;
var a = s.match(re);
if(a.length>10) alert("大于10");
else alert("OK");