Make a simple calculator in HTML using VBScript

Anonymous

23:21

This is a very simple calculator made with HTML and coded with VBScript. This hta file simply evaluates the expression in the text box. The expression can be entered using the mouse to click the buttons or else from the keyboard. To prevent the chance of invalid data being entered, only numerical keys and the signs are allowed on the keyboard. Also you can use Enter key to evaluate the expression and C to clear the text box.

To make the calculator just save the following code with a .hta extension using notepad. Hope this code helps you improve your scripting!

<html><head><title>Calculator</title><HTA:APPLICATION   APPLICATIONNAME="Calculator"   ID="Calc"   VERSION="1.0"   SCROLL="no"   MAXIMIZEBUTTON="no"   SHOWINTASKBAR="no"/></head> <style> .btn{font-family: Arial;   font-size: 12;   color: #000000;   background-color: #FFFFFF;   width: 40;   height: 25;}   .eq {font-family: Arial;   font-size: 12;   color: #000000;   background-color: #FFFFFF;   width: 40;   height: 85;}   .0 {font-family: Arial;   font-size: 12;   color: #000000;   background-color: #FFFFFF;   width: 85;   height: 25;}  </style> <script language="VBScript"> Sub Window_OnLoad    Dim width,height    width=270    height=300    self.ResizeTo width,height    box.focus End Sub  Function btnb On Error Resume Next count = 0 text = box.value count = Len(box.value) count = count-1 box.value = Left(box.value, count) End Function  Function eq On Error Resume Next junk = Eval(box.value) If (Err.Number <> 0) Then box.value = Err.Description Else box.value = Eval(box.value) End If End Function  Function AddBox(ID) box.value = box.value&ID End Function  Function KPS If (window.event.keycode = 99) Then box.value = "" Else If (window.event.keycode = 13) Then eq() Else If (window.event.keycode = 8) Then btnb() Else If ((window.event.keycode <> 94) And (window.event.keycode < 40 Or window.event.keycode > 41) And (window.event.keycode < 42 Or window.event.keycode > 57)) Then window.event.returnvalue = False Else cxz.focus box.value = box.value & Chr(window.event.keycode) End If End If End If End If End Function  </script> <body bgcolor="white" onkeypress="KPS"><table align="center" id="cxz"><caption><hr><b>CALCULATOR</b><hr></caption><tr><td colspan="5" align="center"><input type="text" id="box" size="30" onclick="cxz.focus" readonly></tr><tr><td colspan="2"><input type="button" value="Backspace" class="0" id="btna" onclick="btnb" onmouseover="btna.style.background = '#808080'" onmouseout="btna.style.background = '#FFFFFF'"></td><td><input type="button" value="(" class="btn" id="btnz" onclick="AddBox('(')" onmouseover="btnz.style.background = '#808080'" onmouseout="btnz.style.background = '#FFFFFF'"></td><td><input type="button" value=")" class="btn" id="btnc" onclick="AddBox(')')" onmouseover="btnc.style.background = '#808080'" onmouseout="btnc.style.background = '#FFFFFF'"></td><td><input type="button" value="C" class="btn" id="btnd" onclick="box.value = ''" onmouseover="btnd.style.background = '#808080'" onmouseout="btnd.style.background = '#FFFFFF'"></td></tr><tr><td><input type="button" value="7" class="btn" id="btne" onclick="AddBox('7')" onmouseover="btne.style.background = '#808080'" onmouseout="btne.style.background = '#FFFFFF'"></td><td><input type="button" value="8" class="btn" id="btnf" onclick="AddBox('8')" onmouseover="btnf.style.background = '#808080'" onmouseout="btnf.style.background = '#FFFFFF'"></td><td><input type="button" value="9" class="btn" id="btng" onclick="AddBox('9')" onmouseover="btng.style.background = '#808080'" onmouseout="btng.style.background = '#FFFFFF'"></td><td><input type="button" value="/" class="btn" id="btnh" onclick="AddBox('/')" onmouseover="btnh.style.background = '#808080'" onmouseout="btnh.style.background = '#FFFFFF'"></td><td><input type="button" value="^" class="btn" id="btni" onclick="AddBox('^')" onmouseover="btni.style.background = '#808080'" onmouseout="btni.style.background = '#FFFFFF'"></td></tr><tr><td><input type="button" value="4" class="btn" id="btnj" onclick="AddBox('4')" onmouseover="btnj.style.background = '#808080'" onmouseout="btnj.style.background = '#FFFFFF'"></td><td><input type="button" value="5" class="btn" id="btnk" onclick="AddBox('5')" onmouseover="btnk.style.background = '#808080'" onmouseout="btnk.style.background = '#FFFFFF'"></td><td><input type="button" value="6" class="btn" id="btnl" onclick="AddBox('6')" onmouseover="btnl.style.background = '#808080'" onmouseout="btnl.style.background = '#FFFFFF'"></td><td><input type="button" value="*" class="btn" id="btnm" onclick="AddBox('*')" onmouseover="btnm.style.background = '#808080'" onmouseout="btnm.style.background = '#FFFFFF'"></td><td rowspan="3"><input type="button" value="=" class="eq" id="btnn" onclick="eq" onmouseover="btnn.style.background = '#808080'" onmouseout="btnn.style.background = '#FFFFFF'"></td></tr><tr><td><input type="button" value="1" class="btn" id="btno" onclick="AddBox('1')" onmouseover="btno.style.background = '#808080'" onmouseout="btno.style.background = '#FFFFFF'"></td><td><input type="button" value="2" class="btn" id="btnp" onclick="AddBox('2')" onmouseover="btnp.style.background = '#808080'" onmouseout="btnp.style.background = '#FFFFFF'"></td><td><input type="button" value="3" class="btn" id="btnq" onclick="AddBox('3')" onmouseover="btnq.style.background = '#808080'" onmouseout="btnq.style.background = '#FFFFFF'"></td><td><input type="button" value="-" class="btn" id="btnr" onclick="AddBox('-')" onmouseover="btnr.style.background = '#808080'" onmouseout="btnr.style.background = '#FFFFFF'"></td></tr><tr><td colspan="2"><input type="button" value="0" class="0" id="btns" onclick="AddBox('0')" onmouseover="btns.style.background = '#808080'" onmouseout="btns.style.background = '#FFFFFF'"></td><td><input type="button" value="." class="btn" id="btnt" onclick="AddBox('.')" onmouseover="btnt.style.background = '#808080'" onmouseout="btnt.style.background = '#FFFFFF'"></td><td><input type="button" value="+" class="btn" id="btnu" onclick="AddBox('+')" onmouseover="btnu.style.background = '#808080'" onmouseout="btnu.style.background = '#FFFFFF'"></td></tr></table></body></html>

Done.! Enjoy .!

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