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分享大家帮小弟改一下！如何限制当文本框中输入空值时，不能提交
<html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){alert("您输入的空值，请重新输入，谢谢!")}
}
</script>
</head>
<body>
<form action="lll.htm">
<input name=aaa value="">
<input type=submit name=ok value="OK" onclick="testnull()">
</form></body>
</html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){alert("您输入的空值，请重新输入，谢谢!")}
}
</script>
</head>
<body>
<form action="lll.htm">
<input name=aaa value="">
<input type=submit name=ok value="OK" onclick="testnull()">
</form></body>
</html>
...全文
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xuzuning 2003-02-11
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输入全是空格应视为空
<script>
String.prototype.Trim = function() {
return this.replace(/(^\s*)|(\s*$)/g, "");
}
function testnull(form) {
if(form.aaa.value.Trim()==""){
alert("您输入的空值，请重新输入，谢谢!");
return false;
}
}
</script>
<form action="xxx.htm" onsubmit="return testnull(this);">
<input name=aaa value="">
<input type=submit>
</form>
<script>
String.prototype.Trim = function() {
return this.replace(/(^\s*)|(\s*$)/g, "");
}
function testnull(form) {
if(form.aaa.value.Trim()==""){
alert("您输入的空值，请重新输入，谢谢!");
return false;
}
}
</script>
<form action="xxx.htm" onsubmit="return testnull(this);">
<input name=aaa value="">
<input type=submit>
</form>
genuis 2003-02-11
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用 coffee_cn(coffee) 的应该可以
cqandy 2003-02-11
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wangxj0600(旁观拍手笑疏狂，疏又何妨，狂又何妨)：
不对呀，你的修改，输入与不输入都要提交！
能不能让它为空时，不提交呢？？？
不对呀，你的修改，输入与不输入都要提交！
能不能让它为空时，不提交呢？？？
coffee_cn 2003-02-11
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<html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){
alert("您输入的空值，请重新输入，谢谢!");
return false;
}
}
</script>
</head>
<body>
<form action="lll.htm" onsubmit="javascript:return testnull();">
<input name=aaa value="">
<input type=submit name=ok value="OK">
</form></body>
</html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){
alert("您输入的空值，请重新输入，谢谢!");
return false;
}
}
</script>
</head>
<body>
<form action="lll.htm" onsubmit="javascript:return testnull();">
<input name=aaa value="">
<input type=submit name=ok value="OK">
</form></body>
</html>
wangxj0600 2003-02-11
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<html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){alert("您输入的空值，请重新输入，谢谢!");return ;}
}
</script>
</head>
<body>
<form action="lll.htm">
<input name=aaa value="">
<input type=submit name=ok value="OK" onclick="testnull();return false;">
</form></body>
</html>
<head>
<script>
function testnull() {
if(document.all.aaa.value==""){alert("您输入的空值，请重新输入，谢谢!");return ;}
}
</script>
</head>
<body>
<form action="lll.htm">
<input name=aaa value="">
<input type=submit name=ok value="OK" onclick="testnull();return false;">
</form></body>
</html>
wangyime 2003-02-11
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function testnull() {
if(document.all.aaa.value=="")
{alert("您输入的空值，请重新输入，谢谢!")
return false;
}
}
if(document.all.aaa.value=="")
{alert("您输入的空值，请重新输入，谢谢!")
return false;
}
}
