问题1:
<form method="post" action="" name="f" onsubmit="return false;">
<input type="image" name="a" onclick="f.b.value='单击';" ondblclick="f.b.value='双击';"/>
<input type="text" name="b" />
</form>
<form method="post" action="" name="f" onsubmit="return false;">
<input type="image" name="a" onclick="f.b.value='单击';" ondblclick="f.b.value='双击';"/>
<input type="text" name="b" />
</form>
<script language="javascript">
var r=false;
function keypress(){
if(event.keyCode==13 && !r) {
r=true;
setTimeout(openR,1000);
return true;
}
else return false;
}
function openR(){
r=false;
}
</script>