代码如下： <!--脚本说明:把如下代码加入<body>区域中--> <SCRIPT LANGUAGE="LiveScript"> <!-- function mod(x, x_div){ for (var i=x; i>=x_div; i -= x_div); return i; } function checkNum(str, min, max) { if (str == "") { alert("Enter a number in the field, please."); return false; } for (var i = 0; i < str.length; i++) { var ch = str.substring(i, i + 1); if (ch < "0" || ch > "9") { alert("Try a number, please."); return false; } } var val = parseInt(str, 10); if ((val < min) || (val > max)) { alert("Try a number from 1 to "+max+"."); return false; } return true; } function pushbutton(form){ //Check for a valid date if ((checkNum(form.day.value,1,31)) && (checkNum(form.month.value,1,12)) && (checkNum(form.year.value,0,99))){ var cur_day = parseInt(form.day.value,10); var cur_month = parseInt(form.month.value,10); var cur_year = parseInt(form.year.value,10); //alert(" "+cur_day+" "+cur_month+" "+cur_year); //Significant value var sig_val; if (cur_month == 1) sig_val = 0; else if (cur_month == 2) sig_val = 3; else if (cur_month == 3) sig_val = 3; else if (cur_month == 4) sig_val = 6; else if (cur_month == 5) sig_val = 1; else if (cur_month == 6) sig_val = 4; else if (cur_month == 7) sig_val = 6; else if (cur_month == 8) sig_val = 2; else if (cur_month == 9) sig_val = 5; else if (cur_month == 10) sig_val = 0; else if (cur_month == 11) sig_val = 3; else if (cur_month == 12) sig_val = 5; var val1 = mod((cur_year + parseInt(cur_year/4) + cur_day + sig_val),7); //Display the correct file if (val1 == 0) alert("Sunday"); else if (val1 == 1) alert("Monday"); else if (val1 == 2) alert("Tuesday"); else if (val1 == 3) alert("Wednesday"); else if (val1 == 4) alert("Thursday"); else if (val1 == 5) alert("Friday"); else if (val1 == 6) alert("Saturday"); return true; } else return false; } //--> </SCRIPT> <FORM NAME = "What_Day"> <PRE><B>Day:</B> <INPUT TYPE="num" name="day" onChange="if (!checkNum(this.value, 1, 31)){this.focus();this.select();} else {}" size=10 value=""> <B>Month:</B> <INPUT TYPE="num" name="month" onChange="if (!checkNum(this.value, 1, 12)){this.focus();this.select();} else {}" size=10 value=""> <B>Year:</B> <INPUT TYPE="num" name="year" onChange="if (!checkNum(this.value, 0, 99)){this.focus();this.select();} else {}" size=10 value=""> <INPUT TYPE="button" name="Find_Out" value="OK, I'm ready" onclick="pushbutton(this.form)"></PRE> </FORM>
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