给你一个例子,自己再去完善一下:
<script language="javascript">
<!--
function check(charset,checkstr)
{
var len,i,char;
len=checkstr.length;
for (i=0;i<len;i++)
{
char=checkstr.charAt(i);
if (charset.indexOf(char)==-1) return false;
}
return true;
}
function CheckForm()
var pw = new RegExp('-','g')
var numberset1;
numberset1="abcdefg";
if (!check(numberset1,window.newform.planhours.value))
{
alert("请输入英文字母“abcdefg”!");
return false;
}
window.newform.submit();
return true;
}
//-->
</script>
<script language="javascript">
<!--
function check(charset,checkstr)
{
var len,i,char;
len=checkstr.length;
for (i=0;i<len;i++)
{
char=checkstr.charAt(i);
if (charset.indexOf(char)==-1) return false;
}
return true;
}
function CheckForm()
var pw = new RegExp('-','g')
var numberset1;
numberset1="abcdefg";
if (!check(numberset1,window.newform.planhours.value))
{
alert("请输入英文字母“abcdefg”!");
return false;
}
window.newform.submit();
return true;
}
//-->
</script>
<input type="text" onpaste="return false" onkeypress="if (!/[a-z]/i.test(String.fromCharCode(event.keyCode))) event.keyCode =0;">