capture change event of all dropdown jquery code example

Example 1: dropdown option selection change event in jquery

$("select [name='element_name']").change(function(){
	// condition goes here
});

Example 2: jquery get dropdown selected value

<asp:DropDownList ID="DropDownListId" runat="server" CssClass="DropDownListClass"></asp:DropDownList>

var value1 = $("[id*=DropDownListId]").val();
var value2 = $(".DropDownListClass").val();