function errorname() {
                     var name = $(document.getElementById('<%=txtnamekarbar.ClientID %>').value);
                     if (name == '') {
                         document.getElementById('<%=txtnamekarbar.ClientID %>').className = "focus";
                     }
                     else {
                         document.getElementById('<%=txtnamekarbar.ClientID %>').className = "unfocos";
                     }
                 }
                 function txtusernamekarbare() {
                     var username = document.getElementById('<%=txtusernamekarbar.ClientID %>').value;
                     if (username == '') {
                         document.getElementById('<%=txtusernamekarbar.ClientID %>').className = "focus";
                     }
                     else {
                         document.getElementById('<%=txtusernamekarbar.ClientID %>').className = "unfocos";
                     }
                 }
                 function CheckPassword() {
                     var pass1 = document.getElementById('<%=passkarbar.ClientID %>').value;
                     var pass2 = document.getElementById('<%=repasskarbar.ClientID %>').value;
                     if (pass1 == '' | pass2 == '') {
                         document.getElementById('<%=passkarbar.ClientID %>').className = "focus";
                         document.getElementById('<%=repasskarbar.ClientID %>').className = "focus";

                     }
                     else if (pass2 !== pass1) {
                         document.getElementById('<%=repasskarbar.ClientID %>').className = "focus";
                     }
                     else {
                         document.getElementById('<%=repasskarbar.ClientID %>').className = "unfocos";
                         document.getElementById('<%=passkarbar.ClientID %>').className = "unfocos";
                     }

                 }
                 function validateemail() {
                     var email = document.getElementById('<%=emailkarbar.ClientID %>').value;
                     var atpos = email.indexOf("@");
                     var dotpos = email.lastIndexOf(".");
                     if (email == '') {
                         document.getElementById('<%=emailkarbar.ClientID %>').className = "unfocos";
                     }
                     else if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= email.length) {
                         document.getElementById('<%=emailkarbar.ClientID %>').className = "focus";
                     }
                     else {
                         document.getElementById('<%=emailkarbar.ClientID %>').className = "unfocos";
                     }
                 }
                 function phonenumber() {
                     var phoneno = /09\d\d\d\d\d\d\d\d\d/;
                     if (document.getElementById('<%=mobilekarbar.ClientID %>').value.match(phoneno)) {
                         document.getElementById('<%=mobilekarbar.ClientID %>').className = "unfocos";
                     }
                     else {
                         document.getElementById('<%=mobilekarbar.ClientID %>').className = "focus";
                     }
                 }


                 function errorregister() {
                     errorname();
                     txtusernamekarbare();
                     CheckPassword();
                     phonenumber();
                 }

راهنمایی کنید که چگونه این کد هار رو به صورت یک فایل جاوا اسکریپت در بیارم و چگونه ازش استفاده کنم و زمانی که روی دکمه asp.net کلیک این متد ها اجرا بشه

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