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Teach you how to write js games-playing letters

Source: Internet
Author: User
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Drop a letter from the top, enter a letter on the keyboard, and pass it correctly. The next letter is incorrect.

I know several key things when I write this game.

1. onkeydown event, when the mouse is pressed

2. For the onclick event, click

3. var a = (Math. random () * 500 );

Math. random () randomly generates 0-1 decimal places

4. String. fromCharCode (65 + (a * 100) % 26)

Convert a number to a char letter

5. event. keyCode

The value corresponding to the key pressed by the keyboard.

String. fromCharCode (event. keyCode)

6. setTimeout ("setHeight ()", 20 );

The number of millimeters per call .. Method

As long as you know about these games, the js games are basically the same.

---------------------- The following is my source code, which contains jquery, but the selector is used, so you don't need to thank document. getElementById (), others are useless -------------

<Html>
<Head>
<Title>
Test
</Title>
<Style>
Td {
Width: 70px;
Border: 10px double
}
. Tr1 {
Background: # eeeeee
}
. Td1 {
Background: # ff0000
}
. Gamediv1 {
Background: # eeeeee;
Height: 400px;
Width: 600px;
Background-image: url ("216915w224.jpg ");
}
. Box {
Background: # aa9900;
Height: 30px;
Width: 30px;
Text-align: center
}
</Style>
</Head>
<Script src = "jquery-1.4.2.js"> </script>
<Script>
$ (Document). ready (function (){
$ ("Tr"). hover (
Function (){
$ (This). addClass ("tr1 ");
},
Function (){
$ (This). removeClass ("tr1 ");
}
);
$ ("Td"). hover (
Function (){
$ (This). addClass ("td1 ");
},
Function (){
$ (This). removeClass ("td1 ");
}
);

});

Function load (){
$ ("# S"). fadeIn ("slow ");
}

Function show (){
$ ("# S"). fadeIn ("slow ");
}
Function out (){
$ ("# S"). fadeOut ("slow ");
}
 
Var zimu;
Var height;
Var width;
Var rightcount = 0;
Var errcount = 0;

Function startGame (){
Var c = createob ();
Zimu = c;
Var a = (Math. random () * 500 );
Width =;
Height = 20;
SetHeight ();
// SetTimeout (startGame, 1000 );
// $ ("# Div1"). keydown = checkob (c );
}

Function restartGame (){
Rightcount = 0;
Errcount = 0;
Var c = createob ();
Zimu = c;
Var a = (Math. random () * 500 );
Width =;
Height = 20;
SetHeight ();
// SetTimeout (startGame, 1000 );
// $ ("# Div1"). keydown = checkob (c );
}

Function createob (){
Var B = 'a ';
Var a = Math. random ();
Return String. fromCharCode (65 + (a * 100) % 26 );

}
Function checkob (){
If (zimu = String. fromCharCode (event. keyCode )){
$ ("# Div1"). attr ("innerHTML ","");
Rightcount + = 1;
StartGame ();
} Else {
Errcount + = 1
StartGame ();
}

}
Function setHeight (){
Var square = "<div class = 'box' STYLE = 'position: relative; left:" + width + "px; top:" + height + "px; '> "+ zimu +" <div> ";
$ ("# Div1"). attr ("innerHTML", square );
Height + = 1;
If (errcount> 2 ){
Var square = "<div class = 'box' STYLE = 'position: relative; left:" + 200 + "px; top:" + 100 + "px; font: italic normal bolder 19pt Arial '> "+" game end answer: "+ rightcount +" <div> ";
$ ("# Div1"). attr ("innerHTML", square );
} Else {
If (height <= 300 ){
SetTimeout ("setHeight ()", 20 );
} Else {
StartGame ();
}
}
}

</Script>
<Body onload = "load ()" onkeydown = "checkob ()">
<Input type = "button" onclick = "show ()" id = "show" value = "show"/>
<Input type = "button" onclick = "out ()" id = "out" value = "Remove"/>
<Table id = "s">
<Tr>
<Td> sdf </td>
<Td> asdf </td>
<Td> sdfa </td>
<Td> asdf </td>
</Tr>
<Tr>
<Td> asdf </td>
<Td> asdf </td>
<Td> asdgf </td>
<Td> 1 asdf </td>
</Tr>
<Tr>
<Td> asdf </td>
<Td> sdf </td>
<Td> sdf </td>
<Td> sadf </td>
</Tr>
<Tr>
<Td> asdf </td>
<Td> asdf </td>
<Td> asdf </td>
<Td> asdf </td>
</Tr>
</Table>

<Input type = "button" onclick = "startGame ()" id = "out2" value = "start"/>
<Input type = "button" onclick = "restartGame ()" id = "out3" value = "Start again"/>
<Div id = "div1" class = "gamediv1" onkeydown = "checkob ()">
 
</Div>
<Div id = "div2"> </div>
</Body>
</Html>

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Related Keywords:
js write to console how to make small letters how to capitalize all letters how to make capital letters to small letters in word how to convert small letters to capital letters how to convert letters to hexadecimal how to write class

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