html表单的方便操作

//表单阻止复制粘贴

<input class="pass" type="text" oncopy="return false" oncut="return false" placeholder="密  码：" title="password"></input>

//表单阻止重复提交

<input type="button" value="确定" onclick="this.disabled=true; this.form.submit();"/>

//空格提醒

<script type="text/javascript">
function deal(form){
for(i=0; i < form.length; i++){
if(form.elements[i].value == ''){
alert(form.elements[i].title + "不能为空");
}
}
}
</script><form name="form1">

<tr>
<td>销售编号：</td>
<td><input type="text" name="num" title="销售编号"></td>
</tr>
<input type="button" onClick="deal(this.form);" id="change" value="提交">
<input type="reset" value="重置"/>
</form>
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参考
原文：https://blog.csdn.net/u012310056/article/details/78050985