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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>javascript测试</title> <script type="text/javascript" language="javascript"> var n1 = '', n2 = ''; var item1_flag = true; //默认设置为第一运算符 var opr_type = '+'; //运算符默认是加号 //设置初始值函数 function SetVal(item) { document.Cal.OutText.value += item;//字符串的连接 if (item1_flag) { n1 += item; } else n2 += item; } //再输入框中输入运算符 function SetOpr(opr) { document.Cal.OutText.value += opr; item1_flag = false opr_type = opr; } //清屏函数 function Clear() { document.Cal.OutText.value = ""; item1_flag = true; opr_type = '+'; n1 = ''; n2 = ''; } //计算表达式的值 function Compute(obj) { var Result; if ((n1 != '') && (n2 != '')) { if ((eval(n2) == 0) && (opr_type == '/')) { alert('除数不能为0！'); Clear(); return; } else { Result = eval(obj.OutText.value); document.Cal.OutText.value += '='; document.Cal.OutText.value += Result; } } } </script> <link href="StyleSheet.css" rel="stylesheet" type="text/css" /> </head> <body> <div align="center"> <form name="Cal" action="#" > <input type="text" value="" name="OutText" /><br /><br /> <input type="button" class="button1" value="0" /> <input type="button" class="button1" value="1" /> <input type="button" class="button1" value="2" /> <input type="button" class="button1" value="3" /><br /><br /> <input type="button" class="button1" value="4" /> <input type="button" class="button1" value="5" /> <input type="button" class="button1" value="6" /> <input type="button" class="button1" value="7" /><br /><br /> <input type="button" class="button1" value="8" /> <input type="button" class="button1" value="9" /> <input type="button" class="button1" value="+" /> <input type="button" class="button1" value="-" /><br /><br /> <input type="button" class="button1" value="*" /> <input type="button" class="button1" value="/" /> <input type="button" class="button1" value="CE" /> <input type="button" class="button1" value="=" οnclick="Compute(this.form)" /> </form> </div> </body> </html>
本文转自蓬莱仙羽51CTO博客，原文链接：http://blog.51cto.com/dingxiaowei/1366610，如需转载请自行联系原作者