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Why Javascript is not working properly?

  • 2 replies
  • 10 have this problem
  • 15 views
  • Last reply by tpb2012

tpb2012
tpb2012
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I'm working on a web page and trying this script but it is not working (although it is working fine in IE). The code is given below:

My function is:

function validateNumber()
        {
            var x=window.event.keyCode;
            //alert(x);
            if(!(x>=48 && x<=57))
                {
                    alert("Please type a number between 0 and 9 !!");
                }
        }


I'm using it like:

<input type="text" name="cust_age" value=0 size="15" onkeypress="return validateNumber()" style="font-size: 16pt" />

Please let me know how to resolve this problem.

I'm working on a web page and trying this script but it is not working (although it is working fine in IE). The code is given below: My function is:<br /> <br /> <pre><nowiki>function validateNumber() { var x=window.event.keyCode; //alert(x); if(!(x>=48 && x<=57)) { alert("Please type a number between 0 and 9 !!"); } }</nowiki></pre> I'm using it like:<br /> <br /> <pre><nowiki><input type="text" name="cust_age" value=0 size="15" onkeypress="return validateNumber()" style="font-size: 16pt" /></nowiki></pre> Please let me know how to resolve this problem.

Modified by cor-el

Chosen solution

Firefox doesn't use a global window event. On Firefox you need to pass the event to the function.

I think that this should work (I'm not an expert): 

<input type="text" name="cust_age" value=0 size="15" onkeypress="return validateNumber(event)" style="font-size: 16pt" />

function validateNumber(event)
        {
            var x=window.event? window.event.keyCode : event;
            //alert(x);
            if(!(x>=48 && x<=57))
                {
                    alert("Please type a number between 0 and 9 !!");
                }
        }
Read this answer in context 👍 3

All Replies (2)

cor-el
cor-el
  • Top 25 Contributor
  • Moderator
more options

Chosen Solution

Firefox doesn't use a global window event. On Firefox you need to pass the event to the function.

I think that this should work (I'm not an expert): 

<input type="text" name="cust_age" value=0 size="15" onkeypress="return validateNumber(event)" style="font-size: 16pt" />

function validateNumber(event)
        {
            var x=window.event? window.event.keyCode : event;
            //alert(x);
            if(!(x>=48 && x<=57))
                {
                    alert("Please type a number between 0 and 9 !!");
                }
        }
tpb2012
tpb2012 Question owner
more options

Thanks cor-el, that helped! :)