<!--
this macro will render an employee no selector
PARAMETERS:
fieldName
callbackName - callback function name, default will call the field filling funtion
.
-->
<#macro employeeSelector fieldName callbackName="" onChange="">
<#assign ww = JspTaglibs["/WEB-INF/webwork
.tld"] />
<#assign base = req
.contextPath />
<script type="text/javascript" src="${base}/js/xmlextras
.js"></script>
<script>
var employeeSearchPopup;
var windowOptions = "directories=no,location=no,width=700,height=500,alwaysRaised=yes,resizable=yes,scrollbars=yes";
function popupSelector_${fieldName?replace
("
.", "_"
)}
() {
employeeSearchPopup = window
.open
('${base}/exporthr/index
.action', 'employeeSearchPopup', windowOptions
);
employeeSearchPopup
.focus
();
<#if callbackName == "">
callback = function
(employeeNo
){
document
.getElementById
('${fieldName}'
).value = employeeNo;
employeeSearchPopup
.close
();
<#if onChange!="">${onChange?if_exists}
();</#if>
};
<#else>
callback = function
(employeeNo
) {
${callbackName}
(employeeNo
);
};
</#if>
}
function checkEmployeeNo${onChange?if_exists}
(inputField
) {
var employeeNo = inputField
.value;
inputField
.value = employeeNo
.toUpperCase
();
var result = "fail";
if
(employeeNo !=
null && employeeNo
.length > 0
){
var
xmlHttp =
XmlHttp.create
();
var async = false;
xmlHttp.open
("GET", "${base}/exporthr/checkEmployeeNo
.action?employeeNo=" + inputField
.value, async
);
xmlHttp.send(null);
if
(xmlHttp.responseText !=
null &&
xmlHttp.responseText == '<success/>'
){
result= "success";
}else if
(xmlHttp.responseXML !=
null &&
xmlHttp.responseXML
.getElementsByTagName
("success"
).length > 0
){
result= "success";
}else{
alert
("Can not find an employee with the No
. " + employeeNo
);
inputField
.focus
();
inputField
.select
();
}
}else result= "success";
<#if onChange!="">if
(result== "success"
)${onChange?if_exists}
();</#if>
}
</script>
<@ww
.textfield name="'${fieldName}'" id="${fieldName}" size="20" theme="'simple'" onblur="'checkEmployeeNo${onChange?if_exists}
(this
);'"/> <a href="#" onclick="popupSelector_${fieldName?replace
("
.", "_"
)}
();"><img src="${base}/images/icon_usergroups_sml
.gif" align="absmiddle"/></a>
</#macro>
本文深入探讨了XMLHttpRequest在HTTP请求中的应用，特别关注GET和POST方法的区别及用法，帮助开发者理解如何根据需求选择合适的请求类型。
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