JS Disable Browser Back button

When the keyboard knocks down the back key (Backspace)

1. Disable browser auto-fallback

2, but does not affect the password, single line text, multi-line text input box and so on fallback operation

//method One:////When the keyboard knocks down the back key (Backspace)//1. Disable browser auto-fallback//2, but does not affect the password, single line text, multi-line text input box and so on fallback operation//window.onload = function () {//    /**************************** //* [email protected] *//* Time: 2012-08-20 *//* version:2.1 *//     *                          * //     ****************************///document.getElementsByTagName ("body") [0].onkeydown = function () {//        //Get Event Object//var elem = Event.relatedtarget | | event.srcelement | | event.target | | event.currenttarget;//if (Event.keycode = = 8) {//determine the key to backspace//            //gets the element that the cursor is pointing to when the key is pressed//var elem = event.srcelement | | event.currenttarget;//            //determine if you need to prevent the default delivery of events that press the keyboard//var name = Elem.nodename;//if (name! = ' INPUT ' && name! = ' TEXTAREA ') {//return _stopit (event);//            }//var type_e = Elem.type.toUpperCase ();//if (name = = ' INPUT ' && (type_e! = ' TEXT ' && type_e! = ' TEXTAREA ' && type_e! = ' PA ssWOrd ' && type_e! = ' FILE ') {//return _stopit (event);//            }//if (name = = ' INPUT ' && (elem.readonly = = True | | elem.disabled = = true)) {//return _stopit (event);//            }//        }//    }//}//function _stopit (e) {//if (e.returnvalue) {//E.returnvalue = false;//    }//if (e.preventdefault) {//E.preventdefault ();//    }//return false;//}//Method Two:////When the keyboard knocks down the back key (Backspace)//1. Disable browser auto-fallback//2, but does not affect the password, single line text, multi-line text input box and so on fallback operation//handling keyboard events prevents back key (Backspace) passwords or single-line, multiline text boxes except//function Banbackspace (e) {//var ev = e | | window.event;//Get Event Object//var obj = Ev.target | | ev.srcelement;//Get Event Source//var t = Obj.type | | obj.getattribute (' type ');//Get Event Source Type//    //gets the event type as a criterion//var vreadonly = Obj.getattribute (' readonly ');//var venabled = Obj.getattribute (' enabled ');//    //handling Null value cases//vreadonly = (vreadonly = = null)? false:vreadonly;//venabled = (venabled = = null)? true:venabled;//    //when the BACKSPACE key is hit, the event source type is password or single line, multiline text,//    //and the ReadOnly property is True or the Enabled property is False, the BACKSPACE key fails//var Flag1 = (Ev.keycode = = = 8 && (t = = "password" | | t = "text" | | t = "TEXTAREA")//&& (vreadonly = = True | | venabled! = TRUE))? True:false;//    //when the BACKSPACE key is hit, the event source type is non-password or single-line, multiline text, the BACKSPACE key is invalidated//var Flag2 = (Ev.keycode = = 8 && t! = "password" && t! = "text" && t! = "textarea")//? true:false;//    //Judging//if (flag2) {//return false;//    }//if (Flag1) {//return false;//    }//}////Disable Back button action on Firefox, Opera//document.onkeypress = banbackspace;////disable Back key action on IE, Chrome//document.onkeydown = banbackspace;//Method Three:////When the keyboard knocks down the back key (Backspace)//1. Disable browser auto-fallback//2, but does not affect the password, single line text, multi-line text input box and so on fallback operation//handling keyboard events prevents back key (Backspace) passwords or single-line, multiline text boxes except//<script language= "JavaScript" >//Javascript:window.history.forward (1);//</script>

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The best solution for method Two, method one under Chrome and IE through under Firefox does not pass.

The contents are all sourced elsewhere:

http://volunteer521.iteye.com/blog/830522/

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JS Disable Browser Back button