如何设定首字母为大写
<head>
<title>标题页</title>
<SCRIPT LANGUAGE="JavaScript">
function changeCase(frmObj)
{
var index;
var tmpStr;
var tmpChar;
var preString;
var postString;
var strlen;
tmpStr = frmObj.value.toLowerCase(); //转换为全部小写
strLen = tmpStr.length; //字符的长度
if (strLen > 0) {
for (index = 0; index < strLen; index++)
{
if (index == 0) {
//将第一位字符转换为大写
tmpChar = tmpStr.substring(0,1).toUpperCase();
postString = tmpStr.substring(1,strLen);
tmpStr = tmpChar + postString;
}
else {
tmpChar = tmpStr.substring(index, index+1);
//如果是第二个单词（通过空格判断）
if (tmpChar == " " && index < (strLen-1)) {
tmpChar = tmpStr.substring(index+1, index+2).toUpperCase();
preString = tmpStr.substring(0, index+1);
postString = tmpStr.substring(index+2,strLen);
tmpStr = preString + tmpChar + postString;
}
}
}
}
frmObj.value = tmpStr; //显示转换后的文本
}
</script>
</head>
<body>
<input type=text name="txt1" value="this is test!">
<input type=button value="转换文本" onClick="javascript:changeCase(txt1)">
</body>
</html>
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