Calculator Online - Máy tính online cho diễn đàn.

[Exterminator]

Demo : http://khoahoctunhien.2forum.biz/html-h32.htm

Các bạn có thể chèn vào bất kì chỗ nào cũng được, hoặc tạo 1 trang html giống mình cũng được. Đây sẽ là một ứng dụng online giúp bổ sung cho forum bạn thêm phong phú và nhiều chức năng hay.

Code : View source hoặc copy code dưới đây :

Chèn phần này vào overall_header_new:

Code:

<SCRIPT LANGUAGE="JavaScript">

<!-- start hiding
function getPi() {return Math.PI}
function getRandom() {return Math.random()}
function change()
{
        var temp = document.calculator.text.value;
        if (temp.substring(0,1) == "-") {document.calculator.list.value =
"";
document.calculator.text.value = 0 - document.calculator.text.value * 1}
        if (temp.substring(0,1) != "-") {document.calculator.list.value =
"";
document.calculator.text.value = "-" + temp.substring(0,temp.length)}
}
function recip(x)
{document.calculator.text.value = (1/(x))}
function raisePower(x)
{
var y = 0
y = prompt("Bạn muốn mũ mấy? - 08 DB B Community!", "")
document.calculator.text.value = Math.pow(x,y)
}
// end hiding -->
</SCRIPT>

Phần code này tùy bạn muốn chèn vào chỗ nào cũng được :

Code:

<center>
<TABLE BORDER=1 CELLSPACING=2 CELLPADDING=3%>
<TR>
<FORM NAME="calculator">
<TD COLSPAN=5 BGCOLOR=RED>
<CENTER>
<INPUT NAME="list" TYPE=HIDDEN>
<INPUT TYPE=TEXT NAME="text" VALUE="">
</TD>
<TD COLSPAN=2 BGCOLOR=RED><CENTER>
<INPUT TYPE=BUTTON VALUE=" Backspace " NAME="backspace"
onClick="document.calculator.text.value =
document.calculator.text.value.substring(0,document.calculator.text.value.length*1 -1)">
</TD>
<TD COLSPAN=2 BGCOLOR=RED><CENTER>
<INPUT TYPE=BUTTON VALUE=" Clear " NAME="clear"
onClick="document.calculator.text.value=''">
</TD>
</TR>
<TR>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 7 " NAME="but7"
onClick="document.calculator.text.value+='7'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 8 " NAME="but8"
onClick="document.calculator.text.value+='8'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 9 " NAME="but9"
onClick="document.calculator.text.value+='9'">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" + " NAME="add"
onClick="document.calculator.text.value+='+'">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" - " NAME="subtract"
onClick="document.calculator.text.value+='-'">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE="BUTTON" VALUE=" 1/x " NAME="reciprocal"
onClick="recip(document.calculator.text.value)">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE="BUTTON" VALUE=" x^y " NAME="power"
onClick="raisePower(document.calculator.text.value)">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" sin " NAME="sin"
onClick="document.calculator.text.value=
Math.sin(document.calculator.text.value*3.141592653589793/180)">
</TD>
</TR>
<TR>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 4 " NAME="but4"
onClick="document.calculator.text.value+='4'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 5 " NAME="but5"
onClick="document.calculator.text.value+='5'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 6 " NAME="but6"
onClick="document.calculator.text.value+='6'">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" * " NAME="multiply"
onClick="document.calculator.text.value+='*'">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" / " NAME="divide"
onClick="document.calculator.text.value+='/'">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" | x | " NAME="absolute"
onClick="document.calculator.text.value=
Math.abs(document.calculator.text.value)">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" exp. " NAME="exp"
onClick="document.calculator.text.value+='E'">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" cos " NAME="cos"
onClick="document.calculator.text.value=
Math.cos(document.calculator.text.value*3.141592653589793/180)">
</TD>
</TR>
<TR>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 1 " NAME="but1"
onClick="document.calculator.text.value+='1'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 2 " NAME="but2"
onClick="document.calculator.text.value+='2'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 3 " NAME="but3"
onClick="document.calculator.text.value+='3'">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" ( " NAME="leftbracket"
onClick="document.calculator.text.value+='('">
</TD>
<TD BGCOLOR=YELLOW><CENTER>
<INPUT TYPE=BUTTON VALUE=" ) " NAME="rightbracket"
onClick="document.calculator.text.value+=')'">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" x² " NAME="square"
onClick="document.calculator.text.value= document.calculator.text.value *
document.calculator.text.value">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" round " NAME="round"
onClick="document.calculator.text.value=
Math.round(document.calculator.text.value)">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" tan " NAME="tan"
onClick="document.calculator.text.value=
Math.tan(document.calculator.text.value*3.141592653589793/180)">
</TD>
</TR>
<TR>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" 0 " NAME="but0"
onClick="document.calculator.text.value+='0'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE="  .  " NAME="decimal"
onClick="document.calculator.text.value+='.'">
</TD>
<TD BGCOLOR=BLUE><CENTER>
<INPUT TYPE=BUTTON VALUE=" +|- " NAME="sign" onClick="change()">
</TD>
<TD COLSPAN=2 BGCOLOR=BLACK><CENTER>
<INPUT TYPE=BUTTON VALUE="    =    " NAME="equals"
onClick="document.calculator.text.value=eval(document.calculator.text.value)
">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" x½ " NAME="sqrt"
onClick="document.calculator.text.value=
Math.sqrt(document.calculator.text.value)">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" rand " NAME="random"
onClick="document.calculator.text.value = getRandom()">
</TD>
<TD BGCOLOR=LIME><CENTER>
<INPUT TYPE=BUTTON VALUE=" pi " NAME="pi"
onClick="document.calculator.text.value+= getPi()">
</TD>
</TR>
</TABLE>
</FORM>
</center>

Chúc vui!