submit與onsubmit
發生順序:onsubmit -> submit
阻止表單提單:
<script>
function submitFun(){
//邏輯判斷
return true; //允許表單提交
//邏輯判斷
return false;//不允許表單提交
}
</script>
<form onsubmit="reture submitFun();"> //注意此處不能寫成 onsubmit="submitFun();"否則將表單總是提交</form>