复制代码代码如下://此种为异步，还不等ajax赋完值，函数就return了。
function getCaseInfoForMap(){var formInfo=$("#firstForm").serialize();var dd;$.ajax({type:"post",url:"/webmodule/constructionDecision/WjInfo/getCaseInfoForMap.do?timeType="+timeType+"&gridNumber="+gridNumber,dataType:"json",data:formInfo,success:function(data){dd=data;}});return dd;//}//测试function test(){var data=getCaseInfoForMap();alert(data[0].caseId);}复制代码代码如下://此种为同步async:false,ajax执行不完不会return function getCaseInfoForMap(){var formInfo=$("#firstForm").serialize();var dd="";$.ajax({type:"post",url:"/webmodule/constructionDecision/WjInfo/getCommCaseInfoCount.do?timeType="+timeType+"&gridNumber=110105217",dataType:"json",data:formInfo,async:false,success:function(data){dd=data;}});return dd;}//测试function test(){var data=getCaseInfoForMap();alert(data);}