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计算任一天星期几

[日期：2006-12-16 23:54:22]

[浏览指数：2118]

<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">

<B>Month:</B>

</FORM>

特别说明：文本框里含有up/js/***.js内容的请用查看按钮查看演示！

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