代码如下:
<script type="text/javascript">
function IsUrl(str){
var regUrl = /(http\:\/\/)?([\w.]+)(\/[\w- \.\/\?%&=]*)?/gi
var result = str.match(regUrl)
if(result!=null) {alert( "Yes ")}
else {alert( "No! ")}
}
</script>
<script type="text/javascript ">
function IsUrl(str){
var regUrl = /(http\:\/\/)?([\w.]+)(\/[\w- \.\/\?%&=]*)?/gi
var result = str.match(regUrl)
if(result!=null) {alert( "Yes ")}
else{alert( "No! ")}
}
</script>
调用方法:
<Form name= "bao ">
<input TYPE= "text " NAME= "txt ">
<Input TYPE=BUTTON value= "TestURL " onClick= "IsUrl(document.bao.txt.value) ">
</FORM>
<!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/htmlcharset=UTF-8">
</head>
<body>
<input onblur="text()" id="text" type="text">
<script type="text/javascript">
function text(){
var string1 = document.getElementById('text')
var string2 = string1.value.indexOf('http://')
if(string2 != 0)
{
alert('你输入的网址不正确')
return false
}
else alert('合法')
}
</script>
</body>
</html>
<!-- 试试,是这样的效果吗? -->