HC9
2016-11-17 23:16
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>1</title> <script type="text/javascript"> var cclater = { a: parseInt(document.getElementById("txt1").value), b: parseInt(document.getElementById("txt2").value), sign: parseInt(document.getElementById("select").value), operation: function () { switch (this.sign) { case "+": return this.a + this.b; case "-": return this.a - this.b; case "*": return this.a * this.b; case "/": return this.a / this.b; } }, setvalue: function () { document.getElementById("fruit").value = this.operation(); } }; //获取第一个输入框的值 //获取第二个输入框的值 //获取选择框的值 //获取通过下拉框来选择的值来改变加减乘除的运算法则 //设置结果输入框的值 </script> </head> <body> <input type='text' id='txt1'/> <select id='select'> <option value='+'>+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type='text' id='txt2'/> <input type='button' value=' = ' onclick="cclater.setvalue()"/> <!--通过 = 按钮来调用创建的函数,得到结果--> <input type='text' id='fruit'/> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>1</title> </head> <body> <input type='text' id='txt1' value="2"/> <select id='select'> <option value='+'>+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type='text' id='txt2' value="2" /> <input type='button' value=' = ' onclick="cclater.setvalue()"/> <input type='text' id='fruit'/> <script type="text/javascript"> var cclater = { a: parseInt(document.getElementById("txt1").value), b: parseInt(document.getElementById("txt2").value), sign: document.getElementById("select").value, operation: function () { switch (this.sign) { case "+": return this.a + this.b; case "-": return this.a - this.b; case "*": return this.a * this.b; case "/": return this.a / this.b; default: return 1; } }, update :function () { this.a= parseInt(document.getElementById("txt1").value); this.b= parseInt(document.getElementById("txt2").value); this.sign= document.getElementById("select").value; }, setvalue: function () { this.update(); document.getElementById("fruit").value = this.operation(); } }; //获取第一个输入框的值 //获取第二个输入框的值 //获取选择框的值 //获取通过下拉框来选择的值来改变加减乘除的运算法则 //设置结果输入框的值 </script> </body> </html>
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