document.all.txtid.value
你的xxx.php?username=window.document.login.username.value
应该这样写:
var ss=window.document.login.username.value
var tt="xxx.php?username="+ss
你的xxx.php?username=window.document.login.username.value
应该这样写:
var ss=window.document.login.username.value
var tt="xxx.php?username="+ss
<form name=login>
<input name=username>
<input type=button value=test onclick=test()>
</form>
<script>
function test(){
var ss=window.document.login.username.value
var tt="xxx.php?username="+ss
alert(tt)
}
</script>
</HTML>
<input id=username>
<input type=button value=test onclick=test()>
<script>
function test(){
var ss=window.document.all.username.value
var tt="xxx.php?username="+ss
alert(tt)
}
</script>
</HTML>