[英]why this code has error
//this is a part of html code
<form>
<b>user:</b> <input type="text" name="user" size="25"/>
<input type="button" name ="submit" value="confirm" onclick= "mehdi(this.form)"/>
</form>
<script type="text/javascript">
function mehdi(rno){
rno.user.value = 2 * Math.PI ;//this is error line user is unknown
alert(rno);
return rno;
}
</script>
what can i do? 我能做什么?
Try This 尝试这个
<form>
<b>user:</b> <input type="text" name="user" size="25"/>
<input type="button" name ="submit" value="confirm" onclick= "mehdi(this.form)">
</form>
<script type="text/javascript">
function mehdi(rno)
{
rno.user.value = 2 * Math.PI ;//this is error line user is unknown
alert(rno.user.value);
return rno.user.value;
}
</script>
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