只是想知道我應該在函數insertDash()後面放置什麼(在所有文本框中放置連字符。有二十八個文本框。看起來如果我嘗試:Document.GetElementByName(「bsu」)。value =「 - 」;它不起作用。還有其他建議嗎?Javascript將所有文本框的值更改爲連字符
<form name='table1' method='post' action='u.php'>
<script language='javascript'>
function insertDash(){
}
</script>
<table name='hworld' border="1" bordercolor='black'>
<tr><th></th>
<th>Sunday</th>
<th>Monday</th>
<th>Tuesday</th>
<th>Wednesday</th>
<th>Thursday</th>
<th>Friday</th>
<th>Saturday</th>
</tr>
<tr>
<th>Breakfast</th>
<th><input tabindex='1' type='text' name='bsu' id ="bsu" /></th>
<th><input tabindex='5' type='text' name='bmo' /></th>
<th><input tabindex='9' type='text' name='btu' /></th>
<th><input tabindex='13' type='text' name='bwe' /></th>
<th><input tabindex='17' type='text' name='bth' /></th>
<th><input tabindex='21' type='text' name='bfr' /></th>
<th><input tabindex='25' type='text' name='bsa' /></th>
</tr>
<tr>
<th>Lunch</th>
<th><input tabindex='2' type='text' name='lsu' /></th>
<th><input tabindex='6' type='text' name='lmo' /></th>
<th><input tabindex='10' type='text' name='ltu' /></th>
<th><input tabindex='14' type='text' name='lwe' /></th>
<th><input tabindex='18' type='text' name='lth' /></th>
<th><input tabindex='22' type='text' name='lfr' /></th>
<th><input tabindex='26' type='text' name='lsa' /></th>
</tr>
<tr>
<th>Dinner</th>
<th><input tabindex='3' type='text' name='dsu' /></th>
<th><input tabindex='7' type='text' name='dmo' /></th>
<th><input tabindex='11' type='text' name='dtu' /></th>
<th><input tabindex='15' type='text' name='dwe' /></th>
<th><input tabindex='19' type='text' name='dth' /></th>
<th><input tabindex='23' type='text' name='dfr' /></th>
<th><input tabindex='27' type='text' name='dsa' /></th>
</tr>
<tr>
<th>Snack</th>
<th><input tabindex='4' type='text' name='ssu' /></th>
<th><input tabindex='8' type='text' name='smo' /></th>
<th><input tabindex='12' type='text' name='stu' /></th>
<th><input tabindex='16' type='text' name='swe' /></th>
<th><input tabindex='20' type='text' name='sth' /></th>
<th><input tabindex='24' type='text' name='sfr' /></th>
<th><input tabindex='28' type='text' name='ssa' /></th>
</tr>
</table>
<input type='submit' value='Submit'>
<input type='button' value='---' onclick="insertDash()">
</form>