z正则表达 //有www为true function isWWW(s) { var patrn=/^[www]$/; if (!patrn.exec(s)) return false return true }
测试<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <script type="text/javascript"> function isWWW(s) { var patrn=/^[www]$/; if (!patrn.exec(s)) return false return true } function ch(){ var a ="wwwfdf"; if(!isWWW(a)){ alert("aaaaaaa"); } } </script> </head>
var express = eval(/^[w]{3}|[http://][w]{3}+$/)
if(express.test(value)){
alert("true");
}
else{
alert("false");
}
//有www为true
function isWWW(s)
{
var patrn=/^[www]$/;
if (!patrn.exec(s)) return false
return true
}
<html>
<head>
<script type="text/javascript">
function isWWW(s)
{ var patrn=/^[www]$/;
if (!patrn.exec(s)) return false
return true
}
function ch(){
var a ="wwwfdf";
if(!isWWW(a)){
alert("aaaaaaa");
}
}
</script>
</head>
<body>
<input type="button" onclick="ch()" value="test"/>
</body>
</html>
// JavaScript Document
function submit_check()
{
if (document.submit_form.submit_1.value==""){
alert("请输入网站名称！");
return false;
}
if (document.submit_form.submit_class1.value==""){
alert("请选择网站分类！");
return false;
}if (document.submit_form.submit_class2.value==""){
alert("请选择链接类型！");
return false;
}
if (document.submit_form.submit_jiage.value==""){
alert("请输入交易价格，如果需要商议，请填写0！");
return false;
}
if (document.submit_form.submit_email.value==""){
alert("请输入联系的QQ号码！");
return false;
}
if (document.submit_form.memo.value==""){
alert("请其他说明，没有请写暂无！");
return false;
}if (document.submit_form.submit_mofei.value==""){
alert("请输入验证码！");
return false;
}document.submit_form.submit();
}