计算某一天星期几

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计算某一天星期几

时间：2009-02-25 点击：1239

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("星期天");

else if (val1 == 1)

alert("星期一");

else if (val1 == 2)

alert("星期二");

else if (val1 == 3)

alert("星期三");

else if (val1 == 4)

alert("星期四");

else if (val1 == 5)

alert("星期五");

else if (val1 == 6)

alert("星期六");

return true;

}

else

return false;

}

//-->
  </SCRIPT>
<FORM NAME = "What_Day">

</FORM></td></tr></table></center>
<br>
<br>
<center>
 <SCRIPT LANGUAGE="JavaScript">

<!-- hide

function goHist(a)

{

history.go(a);

}

//-->

</script></center>
<br>
<br>

最简单的日期显示

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