js验证表单

一、任何一个表单的元素的form 都是表单本身

保持form action。

checkOrder

 <input type="submit" value="修改订单"
   onclick="return checkOrder(this.form)" />

 

function checkOrder(form){

 if (form.orderId.value == '') { alert("请填入订单号!"); form.orderId.focus(); return false;}

}

 

--

<%@ page isELIgnored="false"%>

window.onload = function() {

var paramStr = "${requestScope.resultMsg}";

/* var paramStr = getQueryString("resultMsg"); */

if (paramStr != null && paramStr != undefined && paramStr != '') {

alert(paramStr);

}

document.getElementById("orderId").value = "${requestScope.orderId}";

};

 

function getQueryString(name) {

var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");

var r = window.location.search.substr(1).match(reg);

if (r != null)

return unescape(r[2]);

return null;

}

 

--

EL的${requestScope.}与<%= request.getParameter%>

 

 

二、

<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>

 

function syn() {

	var fm = document.forms[0];
	fm.action="<%=basePath %>synCompData/synmssql.do";
	fm.submit();
}

 

<form>
    <input type="button" value="同步" onclick="syn()">
</form>