I have two JSP page, there are one text and one button in index.jsp,when write some
information in text area and press Enter Key,this page will be submit to other JSP
page named cal.jsp,and in cal.jsp will print a message "receive".when I run this
index.jsp,and write some information in textarea and then press Enter Key,I found this
page is submit to cal.jsp,but I found that cal.jsp print two receive,like follows:
receive
receive
It should print "receive" once,but in fact it prints "receive" twice,why occur this
condition? I only submit once.
My code is follows:
index.jsp
...
<script language="JavaScript">
<!--
function onCheck(){
if(strIsNull(document.thisform.code.value)==true){
alert("can't null");
return;
}
else{
document.thisform.action="cal.jsp";
document.thisform.submit();
}
}
function mykeydown() {
var whichkey=event.keyCode;
if (whichkey==13 || whichkey==10){
document.thisform.action="cal.jsp";
document.thisform.submit();
}
}
-->
</script>
<form form name="thisform" method="post">
<input name="code" type="text" size="18" onkeydown="mykeydown()">
<a href="javascript:onCheck();"><img src="images/queding.gif" width="46" height="19"
border="0"></a>
</form>
...
cal.jsp
...
<%
System.out.println("receive");
%>
Any idea will be appreciated!
Best regards,
Edward
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