jquery的使用小例子

判断文本框是否只读

var isReadonly =  document.getElementById("newIMEI").readOnly;

       var isDisabled =  $("#newIMEIButton").attr("disabled");

       if(isReadonly && isDisabled){

           $("#cause").show();$("#notGree").hide();

       }else{

           alert("请先检验新的IME号码");return;

       }

 获取span的内容

var orderNo = $("#orderNo").text();

获取文本框的内容

var newIMEI = $("#newIMEI").val();

设置button不可以使用

$("#newIMEIButton").attr("disabled", true);

设置文本框只读

var rOnly = document.getElementById("newIMEI");

rOnly.readOnly = true;

 获取单选下拉框select的值

Var troubleType = $("#bigCategory").val();

获取select 选中的 text : $("#ddlregtype").find("option:selected").text();

获取select选中的 value: $("#ddlregtype ").val();

获取select选中的索引: $("#ddlregtype ").get(0).selectedindex;

 一种ajax提交的例子

var data = "";

if(flag=='1'){ //同意

      data="&orderNo="+orderNo+"&reason="+reason+"&newIMEI="+newIMEI+"&oldIMEI="+oldIMEI+"&flag=1"

    }else if(flag=='0'){

    data="orderNo="+orderNo+"&reason="+notGreeDesc+"&newIMEI="+newIMEI+"&oldIMEI="+oldIMEI+"&flag=0"

    }

   

       jQuery.ajax({

      url: "${pageContext.request.contextPath}/shop/order/returnGoods/supplierCommit.do",

      cache: false,

      data:data,

      error:function(){

           alert("JQuery AJAX Error!");             

       },

      success: function(data){

         alert(data);

        if(data=='提交成功'){

        document.location="${pageContext.request.contextPath}/shop/order/changeManager/supplierCenter.do"

        }

      }

    });