A simple calculator based on html+css,jquery (added keyboard sniffing) _jquery

Previously released a simple calculator, today made a change, added a keyboard monitoring event, no longer use the mouse point of order

JS Code:

var Yunsuan = 0;//operation symbol, 0-no operation; 1-addition; 2-subtraction; 3-multiplication; 4-division var change = 0;//after operator needs to empty previous value var NUM1 = 0;//operation First Data var num2 = 0;/ /operation the second data var cunchuvalue = 0;//stored value $ (function () {$ (". Number"). Click (function () {//Hit digital trigger event var num = $ (this). attr (' n
Ame ');
var OldValue = $ ("#jieguo"). html ();
if (change = = 1) {OldValue = ' 0 '; change = 0;} var newvalue = '; if (num = = 1) {OldValue = parsefloat (oldValue); newvalue = OldValue *-1;} else if (num = ".") {if (Oldvalue.indexof ('. ') = = 1) newvalue = OldValue + "."; else newvalue = OldValue;} 
else {if (OldValue = = 0 && oldvalue.indexof ('. ') = = 1) {newvalue = num;} else {newvalue = OldValue + num;}}
$ ("#jieguo"). HTML (newvalue);
});
$ ("#qingPing"). Click (function () {//Click on the screen to trigger event $ ("#jieguo"). HTML ("0"); yunsuan = 0; change = 0; num1 = 0; num2 = 0;}); $ ("#tuiGe"). Click (function () {//Point Repel Case trigger event if (change = = 1) {Yunsuan = 0; change = 0;} var value = $ ("#jieguo"). html (); F (value.length = = 1) {$ ("#jieguo"). HTML ("0");} else {valUE = VALUE.SUBSTR (0, value.length-1);
$ ("#jieguo"). HTML (value);
}
});
$ (". Yunsuan"). Click (function () {//click on the operator symbol to trigger the event change = 1; Yusuan = $ (this). attr (' name '); var value = $ ("#jieguo"). html ();
var dianindex = Value.indexof (".");
if (Dianindex = = value.length) {value = Value.substr (0, value.length-1);} NUM1 = parsefloat (value);
}); $ ("#dengYu"). Click (function () {//click equals symbol to trigger event var value = $ ("#jieguo"). html (); var dianindex = Value.indexof ("."); if (Dian
Index = = value.length) {value = Value.substr (0, value.length-1);} num2 = parsefloat (value);
var sum = 0; if (Yusuan = = 1) {sum = Num1 + num2;} else if (Yusuan = = 2) {sum = num1-num2;} else if (Yusuan = 3) {sum = NUM1 *
num2; else if (Yusuan = = 4) {sum = num1/num2;} else if (Yusuan = 0 | | num1 = = 0 | | num2 = 0) {sum = Num1 + num2;} var Re =/^[0-9]+.?
[0-9]*$/;
if (re.test (sum)) {sum = sum.tofixed (2);} $ ("#jieguo"). html (sum);
change = 1;
Yusuan = 0;
NUM1 = 0;
num2 = 0;
}); $ ("#cunChu"). Click (function () {//Click Save TriggerEvent Change = 1;
var value = $ ("#jieguo"). html ();
var dianindex = Value.indexof (".");
if (Dianindex = = value.length) {value = Value.substr (0, value.length-1);} cunchuvalue = parsefloat (value);
});
$ ("#quCun"). Click (function () {//Click to save trigger event change = 1; $ ("#jieguo"). HTML (cunchuvalue);});
$ ("#qingCun"). Click (function () {//Click to save trigger event change = 1; cunchuvalue = 0;}); $ ("#leiCun"). Click (function () {//Click on the memory trigger event change = 1; var value = $ ("#jieguo"). html (); var dianindex = Value.indexof ("."
);
if (Dianindex = = value.length) {value = Value.substr (0, value.length-1);} Cunchuvalue + = parsefloat (value);
}); $ ("#jiCun"). Click (function () {//Click accumulate trigger Event change = 1; var value = $ ("#jieguo"). html (); var dianindex = Value.indexof (".")
; if (Dianindex = = value.length) {value = Value.substr (0, value.length-1);} if (Cunchuvalue = 0) {Cunchuvalue = Parsef
Loat (value);
else {cunchuvalue = Cunchuvalue * parsefloat (value);}});
}); Press the button to listen for $ (document). KeyDown (function (event) {//Digital listening if ((event.keYcode > && Event.keycode < 58) | | (Event.keycode > && event.keycode < 106) | |
(Event.keycode = = 190 | | event.keycode = 110)) &&!event.shiftkey) {keydownnum (event.keycode);}//"+" Listening for if ((Event.keycode = = 187 && Event.shiftkey) | |  Event.keycode = = {Keydownyusuan (1);}//"-" listening if (Event.keycode = = 189 && event.shiftkey) | | event.keycode = = 109) {Keydownyusuan (2);}//"*" Monitor if ((Event.keycode = && event.shiftkey) | | event.keycode =) {key
Downyusuan (3); //"/" monitor if (Event.keycode = = 191 | | event.keycode =) {Keydownyusuan (4);}//"=" Listen for if (Event.keycode = 187 ;&!event.shiftkey) | |  Event.keycode = = {$ ("#dengYu"). Click ();//fallback to listen for if (Event.keycode = = 8) {$ ("#tuiGe"). Click (); return false;// "Clear Screen" monitor if (Event.keycode = | | event.keycode = 46 | | (Event.keycode = = && Event.shiftkey))
{$ ("#qingPing"). Click (); return false;} "Store" listening if (Event.keycode = 112){$ ("#cunChu"). Click (); return false;} "Fetch" listens for if (Event.keycode = = 113) {$ ("#quCun"). Click (); return false;//"" listening if (Event.keycode = = 114) {$ ("#leiCu
N "). Click ();
return false; //"Accumulate" listen for if (Event.keycode = = * * * * * ("#jiCun"). Click (); return false;//"Clear" listen if (Event.keycode = = 117) {$ ("#qin
Gcun "). Click ();
return false;
}
}); /** * Key Trigger operator value 1-' + ' 2-'-' 3-' * ' 4-'/'/function Keydownyusuan (value) {change = 1; Yusuan = value; var value = $ ("
#jieguo "). html ();
var dianindex = Value.indexof (".");
if (Dianindex = = value.length) {value = Value.substr (0, value.length-1);} NUM1 = parsefloat (value);  /** * Key triggers digital code ASCLL code/function Keydownnum (code) {var number = 0; if (code = = | | code = 96) {//"0" monitor
0; } if (code = = | | code = = 97) {//"1" listens for number = 1;} if (code = = | | code = = 98) {//"2" listener number = 2;} if (Code = = 51 | | Code = = 99) {//"3" Listener number = 3;} if (Code = | | code = = 100) {//"4" Listener number = 4;} if (code = N1) {//"5" Listener number = 5;} if (code = n | | code = = 102) {//"6" monitor number = 6;} if (Code = = | code = = 103) {//"7" Monitor
Number = 7; } if (code = = | | code = = 104) {//"8" listens for number = 8;} if (code = = | | code = = 105) {//"9" Monitor number = 9;} if (code = = 190 | | Code = = 110) {//"."
Monitor number = ".";
var num = number;
var OldValue = $ ("#jieguo"). html ();
if (change = = 1) {OldValue = ' 0 '; change = 0;} var newvalue = '; if (num = = 1) {OldValue = parsefloat (oldValue); newvalue = OldValue *-1;} else if (num = ".") {if (Oldvalue.indexof ('. ') = = 1) newvalue = OldValue + "."; else newvalue = OldValue;} 
else {if (OldValue = = 0 && oldvalue.indexof ('. ') = = 1) {newvalue = num;} else {newvalue = OldValue + num;}}
$ ("#jieguo"). HTML (newvalue); 

 }

html/css Code:

<%@ page language= "java" contenttype= "text/html; charset=utf-"pageencoding=" utf-"%> <! DOCTYPE html>  

Calculator style layout to draw on others, but the code is my own writing, due to the time reason did not have a chance to test, heroes in the use of the process found that there are bugs welcome to put forward, common learning progress, thank you.