<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>test</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js" type="text/javascript"></script> <script> $(document).ready(function(){ $("input[name=radioBtn1]").click(function(){ var val = $("input[name=gender][checked]").val(); alert(val); }); $("input[name=radioBtn2]").click(function(){ $('input[name=gender]').attr("checked",'2'); //$('input[name=gender]').get(2).checked=true; //这种写法也可以 }); $("input[name=btn3]").click(function(){ $("input[name=fruit][checked]").each(function(){ alert($(this).attr("value")); }); }); $("input[name=btn4]").click(function(){ $("input[name=fruit]").get(1).checked = true; }); $("input[name=btn5]").click(function(){ $("input[name='fruit']").attr("checked",true); /* $("input[name='fruit']").each(function(){ $(this).attr("checked",true); });*/ }); $("input[name=btn6]").click(function(){ $("input[name='fruit']").attr("checked",''); /* $("input[name='fruit']").each(function(){ $(this).attr("checked",''); });*/ }); $("input[name=btn7]").click(function(){ var val = $("select[name=hometown]").val(); alert(val); }); $("input[name=btn8]").click(function(){ //var val = $("select[name=hometown]").find("option:selected").text(); //var val = $("select[name=hometown] option[selected]").text(); var val = $("select[name=hometown] option:selected").text(); alert(val); }); $("input[name=btn9]").click(function(){ //$("select[name=hometown]").get(0).selectedIndex = 1; //same $("select[name=hometown]")[0].selectedIndex = 1; }); $("input[name=btn10]").click(function(){ $("select[name=hometown]").empty(); }); }); </script> </head> <body> Are you male or femal? <br> <input type="radio" name="gender" checked value="male">male<br> <input type="radio" name="gender" value="female">female<br> <input type="radio" name="gender" value="gay">gay<br> <input type="button" value="获得radio选中的值" name="radioBtn1"> <input type="button" value="设gay为被选项" name="radioBtn2"> <hr> Which fruit do you like?<br> <input type="checkbox" name="fruit" value="apple">apple<br> <input type="checkbox" name="fruit" value="strawberry">strawberry<br> <input type="checkbox" name="fruit" value="mango">mango<br> <input type="checkbox" name="fruit" value="cherry">cherry<br> <input type="checkbox" name="fruit" value="leechee">leechee<br> <input type="button" value="获取checkbox的选中值" name="btn3"> <input type="button" value="love strawberry" name="btn4"><br><br> <input type="button" value="全选" name="btn5"> <input type="button" value="取消全选" name="btn6"> <hr> where is your hometown? <select name='hometown'> <option value='shandong'>山东</option> <option value='sichuang'>四川</option> <option value='shanghai'>上海</option> </select> <br><br> <input type='button' name='btn7' value='select被选中的value值'> <input type='button' name='btn8' value='select被选中的文本值'> <input type='button' name='btn9' value='设置‘四川’为当前选中值'> <input type='button' name='btn10' value='清空下拉框'> </body> </html>