<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<script language="javascript" >function checkText(){
String.prototype.trim=function (){return this.replace(/(^\s*)|(\s*$)/g,'');} var form = document.forms[0];
for (var i = 0; i < form.elements.length; i++) {
if (form.elements[i].type == "text" || form.elements[i].type == "password") {
if ((form.elements[i].value).trim() == "") {
alert("null");
form.elements[i].focus();
return false;
}
}
}
return true ;
}
</script>
<body>
<form name="form1" method="post" action="" onSubmit="return checkText();">
<input type="text" name="textfield">
<input type="text" name="textfield2">
<input type="text" name="textfield3">
<input type="text" name="textfield4">
<input type="submit" name="Submit" value="提交">
</form>
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<script language="javascript" >function checkText(){
String.prototype.trim=function (){return this.replace(/(^\s*)|(\s*$)/g,'');} var form = document.forms[0];
for (var i = 0; i < form.elements.length; i++) {
if (form.elements[i].type == "text" || form.elements[i].type == "password") {
if ((form.elements[i].value).trim() == "") {
alert("null");
form.elements[i].focus();
return false;
}
}
}
return true ;
}
</script>
<body>
<form name="form1" method="post" action="" onSubmit="return checkText();">
<input type="text" name="textfield">
<input type="text" name="textfield2">
<input type="text" name="textfield3">
<input type="text" name="textfield4">
<input type="submit" name="Submit" value="提交">
</form>
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<script language="javascript" >function checkText(){
String.prototype.trim=function (){return this.replace(/(^\s*)|(\s*$)/g,'');} var form = document.forms[0];
for (var i = 0; i < form.elements.length; i++) {
if (form.elements[i].type == "text" || form.elements[i].type == "password") {
if ((form.elements[i].value).trim() == "") {
alert("null");
form.elements[i].focus();
return false;
}
}
}
form.action = "111.htm" ;
return true ;
}
</script>
<body>
<form name="form1" method="post" action="" onSubmit="return checkText();">
<input type="text" name="textfield">
<input type="text" name="textfield2">
<input type="text" name="textfield3">
<input type="text" name="textfield4">
<input type="submit" name="Submit" value="提交">
</form>
</body>
</html>