当我从浏览器关闭此页面时，会打开一个警告框，询问“离开此页面”或“留在此页面”，没关系。但是，当从下面给出的“提交”按钮提交表单时，它会再次询问并显示此警报框。我如何在提交表单时禁用此功能，不应该询问并显示警报框？
<script>
window.onbeforeunload = function(e) {
return 'You application form is not submitted yet.';
};
WinPrint.document.write('<span style="font-size:22px">' + prtContent.innerHTML + '<span>');
</script>
<div>
<input type="submit" name="" class="button" value="Save Your Application Form" onclick="if(document.getElementById('thumb').value=='') { alert('Please select your photograph.'); return false; } return confirm('Read your application form thoroughly before submitting, Once submitted data, it will not changed in any case, press OK to submit or press CANCEL to make corrections.'); return false;" style="text-align:center !important; float:none !important;"/>
</div>
$(document).on("submit", "form", function(event){
window.onbeforeunload = null;
});
应该做的伎俩
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