jQuery 选择第一个值以外的值时，如何自动提交下拉列表？
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How do I auto submit a dropdown when a value is selected other than the first value?
提问by user1899891
Current Code:
当前代码：
<select name='PreviousReceiver' onchange='this.form.submit()'>
<option value='0'>Contact List</option>
<option value='1'>blah</option>
<option value='2'>blah2</option>
<option value='3'>blah3</option>
</select>
So I have this dropdown box that auto submits when the user clicks it. It works fine the way it is, but I dont want it to submit if the user has the first value selected(see above).
所以我有这个下拉框，当用户点击它时会自动提交。它的工作方式很好，但如果用户选择了第一个值（见上文），我不希望它提交。
In other words, if the user clicks contact list, then I don't want it to submit the form.
换句话说，如果用户单击联系人列表，那么我不希望它提交表单。
I tried this:
我试过这个：
onchange="if(this.value != '0') this.form.submit()"
but that just made it never activate.
但这只是让它永远不会激活。
Any suggestions?
有什么建议？
回答by Saranya Sadhasivam
Try without quotes and check.
尝试不使用引号并检查。
<form method="post">
<select name='PreviousReceiver' onchange='if(this.value != 0) { this.form.submit(); }'>
<option value='0'>Contact List</option>
<option value='1'>blah</option>
<option value='2'>blah2</option>
<option value='3'>blah3</option>
</select>
</form>
回答by iJade
Try to call a function on change (use jquery):
尝试在更改时调用函数（使用 jquery）：
<select name='PreviousReceiver' onchange='DoSubmit(this);'>
<option value='0'>Contact List</option>
<option value='1'>blah</option>
<option value='2'>blah2</option>
<option value='3'>blah3</option>
</select>
Here goes your javascript function:
这是你的javascript函数：
function DoSubmit(sel)
{
if(sel.val()!='0') this.form.submit();
}
回答by Patrik
maybe you would like something like this?
也许你想要这样的东西？
<select name='PreviousReceiver' onchange='this.form.submit()'>
<option selected disabled>Contact List</option>
<option value='1'>blah</option>
<option value='2'>blah2</option>
<option value='3'>blah3</option>
</select>
回答by Vinod Louis
you have to write javascript keyword
你必须写javascript关键字
SEE HERE
看这里
<form>
<select name='PreviousReceiver' onchange="javascript: if(this.value != '0') this.form.submit(); else alert('hello');" >
<option value='0'>Contact List</option>
<option value='1'>blah</option>
<option value='2' selected>blah2</option>
<option value='3'>blah3</option>
</select>
</form>
