problem in validating the amount

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  • madhuriks
    New Member
    • Jun 2010
    • 149
    #1

    problem in validating the amount

    hi,
    im my jsp page..i had to enter amount.it is getting validated for nos.But the problem with decimal point...can any one help me..here is the code..
    login.jsp
    Code:
    <s:textfield name="Cost" id="uploadtextContCost" label="Cost "/>
    login.js
    Code:
    if (form.Cost.value == "")
    {
        alert("Enter Content Cost");
        form.Cost.focus();
        return (false);
    }
    var CostValid = document.getElementById('uploadtextContCost').value;
    for(var i = 0; i < CostValid.length; i++)
    {
        currentCode = CostValid.charCodeAt(i);
        if(currentCode!=45 && currentCode!=46 && currentCode<48 || currentCode>57)
        {
            alert('Only Numbers are allowed in Content Cost');
            return false;
        }
        currentCode1 = Math.abs(CostValid);
        if (CostValid != Math.abs(CostValid))
        {
            alert('U had Entered -ve value in Content Cost');
            CostValid = Math.abs(CostValid);
            return false;
        }
    }
    thanks in advance,
    madhu.
    Tags: None
    • Dormilich
      Recognized Expert Expert
      • Aug 2008
      • 8694
      #2
      it’s far more easy to test, whether the whole content is a valid number.

      functions you can use for that (depending on the allowed number type)
      - parseInt()
      - parseFloat()
      - isNaN()
      - isFinite()

      e.g.
      Code:
      if (isNaN(CostValid)) {
	alert("input is not a number.");
	return false;
}

        Comment

        • madhuriks
          New Member
          • Jun 2010
          • 149
          #3
          hi,
          i had changed according what u suggested..here is the code..it is getting validated if i enter 12.58.25..but if i enter 12.58..it is not taking..nd the form is not going to another form..can u help me
          Code:
          <script>
	function test(form) {

		if (form.Cost.value == "")
		    {
		        alert("Enter Content Cost");
		        form.Cost.focus();
		        return (false);
		    }
		    var CostValid = document.getElementById('uploadtextContCost').value;

		    if(!isNaN(CostValid) && CostValid >= 0 && CostValid> 0) {
		        return true;
		    } else {
		        alert("you must enter a valid salary");
		        return false;
		    }

	}
</script>
</head>
<body>
<form action="login.jsp">Cost:<INPUT TYPE="TEXT" NAME="Cost"
	id="uploadtextContCost">Enter reference Number (e.g. F647) <INPUT
	TYPE="button" value="submit" onClick=test(this.form);;></form>
</body>
</html>

            Comment

            • Dormilich
              Recognized Expert Expert
              • Aug 2008
              • 8694
              #4
              well, I wrote
              Code:
              if (isNaN(…))
              not
              Code:
              if (!isNaN(…))
              PS. NaN => Not a Number
              Last edited by Dormilich; Sep 8 '10, 11:45 AM.

                Comment

                • madhuriks
                  New Member
                  • Jun 2010
                  • 149
                  #5
                  i need to get as 12.58..if i give single no. it is going to other form..in my form..the cost value can be anything like 1.00 or 0.25..so how to code it..

                    Comment

                    • Dormilich
                      Recognized Expert Expert
                      • Aug 2008
                      • 8694
                      #6
                      as I already showed in the example.

                        Comment

                        • madhuriks
                          New Member
                          • Jun 2010
                          • 149
                          #7
                          i tried..if i enter 12.58 it is going to other form..but if i enter 12.58.25 it it also going to other form.
                          Code:
                          <script>
	function test(form) {

		if (form.Cost.value == "")
		    {
		        alert("Enter Content Cost");
		        form.Cost.focus();
		        return (false);
		    }
		    var CostValid = document.getElementById('uploadtextContCost').value;

		    if(isNaN(CostValid) && CostValid >= 0 ) {
		        return true;
		    } else {
		        alert("you must enter a valid salary");
		        return false;
		    }

	}
</script>
</head>
<body>
<form action="login.jsp">Cost:<INPUT TYPE="TEXT" NAME="Cost"
	id="uploadtextContCost"><INPUT
	TYPE="button" value="submit" onClick=test(this.form);;></form>
</body>
</html>

                            Comment

                            • Dormilich
                              Recognized Expert Expert
                              • Aug 2008
                              • 8694
                              #8
                              that has nothing to do with the validation. that has something to do with event handling.

                              in DOM 2, you would simply cancel the event action by Event.preventDe fault() (though you would have to use the submit event, not the click event). in DOM 0 you must explicitly return false in the event handler (the event handler is the event attribute’s value, not the return value of the called function)

                              besides that, your logic is screwed. cf. isNaN()

                              PS. if you don’t exactly know what a (native) JavaScript function does, look it up!
                              Last edited by Dormilich; Sep 8 '10, 12:09 PM.

                                Comment

                                • madhuriks
                                  New Member
                                  • Jun 2010
                                  • 149
                                  #9
                                  ok.i'll check it

                                    Comment

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