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Hiệu ứng dùng để thêm dấu phẩy và dấu đô la vào dãy số người dùng nhập vào.

Nhãn: Thêm dấu phẩy vào số

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<SCRIPT language=JavaScript type=text/javascript><!--
/*
 *This JavaScript takes an input number and adds commas in the proper places.
 *As needed by its original purpose, also adds a dollar.
 *Copyright 1998, David Turley <dturley@pobox.com>
 *Feel free to use and build on this code as long as you include this notice.
 *Last Modified March 3, 1998
*/

function commify() {
    var Num = document.form.input.value;
    var newNum = "";
    var newNum2 = "";
    var count = 0;

    //check for decimal number
    if (Num.indexOf('.') != -1){  //number ends with a decimal point
        if (Num.indexOf('.') == Num.length-1){
            Num += "00";
        }
        if (Num.indexOf('.') == Num.length-2){ //number ends with a single digit
            Num += "0";
        }

        var a = Num.split("."); 
        Num = a[0];   //the part we will commify
        var end = a[1] //the decimal place we will ignore and add back later
    }
    else {var end = "00";}  

    //this loop actually adds the commas
    for (var k = Num.length-1; k >= 0; k--){
      var oneChar = Num.charAt(k);
      if (count == 3){
        newNum += ",";
        newNum += oneChar;
        count = 1;
        continue;
      }
      else {
        newNum += oneChar;
        count ++;
      }
   }  //but now the string is reversed!

  //re-reverse the string
  for (var k = newNum.length-1; k >= 0; k--){
      var oneChar = newNum.charAt(k);
      newNum2 += oneChar;
  }

   // add dollar sign and decimal ending from above
   newNum2 = "$" + newNum2 + "." + end;
   document.form.newValue.value = newNum2;
}
// -->
</SCRIPT>

<SCRIPT language=JavaScript type=text/javascript><!--
/*
 *This JavaScript takes an input number and adds commas in the proper places.
 *As needed by its original purpose, also adds a dollar.
 *Copyright 1998, David Turley <dturley@pobox.com>
 *Feel free to use and build on this code as long as you include this notice.
 *Last Modified March 3, 1998
*/

function commify() {
    var Num = document.form.input.value;
    var newNum = "";
    var newNum2 = "";
    var count = 0;
    
    //check for decimal number
    if (Num.indexOf('.') != -1){  //number ends with a decimal point
        if (Num.indexOf('.') == Num.length-1){
            Num += "00";
        }
        if (Num.indexOf('.') == Num.length-2){ //number ends with a single digit
            Num += "0";
        }
        
        var a = Num.split("."); 
        Num = a[0];   //the part we will commify
        var end = a[1] //the decimal place we will ignore and add back later
    }
    else {var end = "00";}  
 
    //this loop actually adds the commas   
    for (var k = Num.length-1; k >= 0; k--){
      var oneChar = Num.charAt(k);
      if (count == 3){
        newNum += ",";
        newNum += oneChar;
        count = 1;
        continue;
      }
      else {
        newNum += oneChar;
        count ++;
      }
   }  //but now the string is reversed!
   
  //re-reverse the string
  for (var k = newNum.length-1; k >= 0; k--){
      var oneChar = newNum.charAt(k);
      newNum2 += oneChar;
  }
   
   // add dollar sign and decimal ending from above
   newNum2 = "$" + newNum2 + "." + end;
   document.form.newValue.value = newNum2;
}
// -->
</SCRIPT>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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<FORM name=form>
<DIV align=center>
<TABLE align=center>
  <TBODY>

  <TR>
    <TD align=right>Enter a number to convert:</TD>
    <TD><INPUT name=input></TD></TR>
  <TR>
    <TD align=middle colSpan=2><INPUT onclick=commify() type=button value="Add Commas" name=button></TD></TR>
  <TR>
    <TD align=right>Here is the converted number:</TD>
    <TD><INPUT 
name=newValue></TD></TR></TBODY></TABLE></DIV></FORM>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->