<ptml> <pead> <title> Judge checkbox and radio-51windows.net</title> <meta http-equiv= " Content-type "content=" text/html; charset=gb2312 "> </pead> <body> <form method=" POST "name=" myformname1 "> <input type=" checkbox "Name=" checkname1 "id=" C11 "value=" "><label for=" C11 "> select 1</label> <input type=" checkbox "Name=" Checkname1 "id=" C12 "value=" "><label for=" C12 "> select 2</label> <input type=" checkbox "Name=" checkname1 "Id=" C13 "value=" "><label for=" C13 "> select 3</label> <input type=" checkbox "Name=" checkname1 "id=" C14 " Value= "" ><label for= "C14" > select 4</label> <input type= "button" onclick= "Alert ischecked ( document.myformname1, ' checkname1 ') the "value=" test has chosen "> <input type=" button "onclick=" Alert Getcheckednum ( document.myformname1, ' checkname1 ') "value=" test select several "> </form> <pr> <form method=" POST "Name=" Myformname2 "> <input type=" Radio "Name=" RAdioname1 "id=" R11 "value=" "><label for=" R11 "> select 1</label> <input type=" Radio "name=" Radioname1 "id= "R12" value= "><label for=" R12 "> select 2</label> <input" button "type=" Alert onclick= ( Document.myformname2, ' radioname1 ') "value=" Test has no choice "> <input type=" reset "value=" reset "> </form> < SCRIPT language= "JavaScript" > <!--function ischecked (oform,checkname) {var len = oform.elements.length; var i=0; For (i=0 i<len; i++) {if (oform.elements[i].name==checkname) {if (oform.elements[i].checked) { return true; }} return false; function Getcheckednum (oform,checkname) {var len = oform.elements.length; var i=0; var checkn = 0; For (i=0 i<len; i++) {if (oform.elements[i].name==checkname) {if (oform.elements[i].checked) { checkn++; }} returnCheckn; }//--> </SCRIPT> </body> </ptml>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
