javascript - textbox take only numeric value and not take zero at the starting -
i new in javascript , want validate textbox javascript.textbox should take numeric value , should not take 0 @ starting. i tried below function works fine not understand how avoid 0 first position. below html code. <asp:textbox id="cp1_txtmob" palceholder="10 digit mobile no." ondrop="return false;" onpaste="return false;" runat="server" class="textfile_new2" style="color: #333;" onkeydown="return isnumberkey(event);" maxlength="10" autocomplete="off"></asp:textbox> function isnumberkey(e) { var t = e.which ? e.which : event.keycode; if ((t >= 48 && t <= 57) || (t >= 96 && t <= 105) || (t == 8 || t == 9 || t == 127 || t == 37 || t == 39 || t == 46)) return true; return false; } please me out. you can use onkeyup="avoidzero(this.id);" like <asp:textbox id="cp1_txtmob" palceholder=&
