檢查表單是否為空或者是空格
阿新 • • 發佈：2019-01-09
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>無標題文件</title> <SCRIPT language=JavaScript> <!-- function checkaddform() { if(checkspace(document.form1.xingming.value)) { document.form1.xingming.focus(); alert("對不起，請填寫姓名！"); return false; } } function checkspace(checkstr) { var str = ''; for(i = 0; i < checkstr.length; i++) { str = str + ' '; } return (str == checkstr); } //--> </SCRIPT> </head> <body> <FORM id=form1 onSubmit="return checkaddform()" method=post name=form1 action=feedbackok.asp> 姓名 <INPUT name=xingming> <INPUT value=提交資訊 type=submit name=Submit> </FORM> </body> </html>