計算機1
將下列程式碼複製至<head>程式碼</head>區內。
<script language="JavaScript"> <!-- hide script from old browser var answer=0 var lastvalue=0 var op="+" var lastop="+" var newnumber=true function input(digit){ if (op==" = ") clearall() if ((!newnumber)&&(document.calc.result.value!="0")) document.calc.result.value+=eval(digit) else document.calc.result.value=""+eval(digit) newnumber=false } function clearnow(){ document.calc.result.value="_" newnumber=true } function clearall(){ answer=0 lastop="+" op="+" clearnow() } function operate(operation){ if ((newnumber!=true)||(op==" = ")) { answer=""+answer if ((operation!=" = ") && (op!=" = ")) { lastvalue=document.calc.result.value lastop=op answer=eval(answer+lastop+lastvalue) document.calc.result.value=answer } else if (operation==" = ") { if (op!=" = ") { lastop=op lastvalue=document.calc.result.value } answer=eval(answer+lastop+lastvalue) document.calc.result.value=answer } newnumber=true } op=operation } function change(){ answer=-1*document.calc.result.value document.calc.result.value=answer } function point(){ if (!newnumber) { number=document.calc.result.value if (number.indexOf('.')==-1) document.calc.result.value+="." } } // end hiding --> </script> <hr width="80%" size="3" color="#FF00FF"> <form name="calc"> <div align="center"> <center> <table border="1" bordercolor="#808000" cellpadding="0"> <tr> <td colspan="5"><input type="text" size="14" name="result" value="_" onfocus="blur()"></td> </tr> <tr> <td><input type="button" name="1" value=" 1 " onclick="input(this.value)"></td> <td><input type="button" name="2" value=" 2 " onclick="input(this.value)"></td> <td><input type="button" name="3" value=" 3 " onclick="input(this.value)"></td> <td><input type="button" name="CE" value=" CE " onclick="clearall()"></td> <td><input type="button" name="C" value=" C " onclick="clearnow()"></td> </tr> <tr> <td><input type="button" name="4" value=" 4 " onclick="input(this.value)"></td> <td><input type="button" name="5" value=" 5 " onclick="input(this.value)"></td> <td><input type="button" name="6" value=" 6 " onclick="input(this.value)"></td> <td><input type="button" name="sing" value=" +/- " onclick="change()"></td> <td><input type="button" name="=" value=" = " onclick="operate(this.value)"></td> </tr> <tr> <td><input type="button" name="7" value=" 7 " onclick="input(this.value)"></td> <td><input type="button" name="8" value=" 8 " onclick="input(this.value)"></td> <td><input type="button" name="9" value=" 9 " onclick="input(this.value)"></td> <td><input type="button" name="+" value=" + " onclick="operate(this.value)"></td> <td><input type="button" name="-" value=" - " onclick="operate(this.value)"></td> </tr> <tr> <td colspan="2"><input type="button" name="0" value=" 0 " onclick="input(this.value)"></td> <td><input type="button" name="." value=" . " onclick="point()"></td> <td><input type="button" name="*" value=" * " onclick="operate(this.value)"></td> <td><input type="button" name="/" value=" / " onclick="operate(this.value)"></td> </tr> </table> </center> </div> </form> <hr width="80%" size="3" color="#FF00FF"> |