JavaScript - Calling A Function

<p>
<script type="text/javascript">// <![CDATA[
var metrics = {
"mm" : 1,
"cm" : 10,
"m" : 1000,
"inch" : 25.4,
"foot" : 304.8
};
function convert(num, dec){
var val = document.getElementById("fromVal").value;
if(isNaN(val)){
return
}


function roundNumber(num, dec) {
var result = Math.round( Math.round( num * Math.pow( 10, dec + 1 ) ) / Math.pow( 10, 1 ) ) / Math.pow(10,dec);
return result;
}

document.getElementById("toVal").value = val *
metrics[document.getElementById("fromSystem").value]/
metrics[document.getElementById("toSystem").value];
}
var interval = null;
function watchChanges(){
interval == null ? setInterval("convert()", 500) :
clearInterval(interval);
}
// ]]></script>
</p>
<table>
<tbody>
<tr>
<td><input id="fromVal" style="width: 100px;" onfocus="watchChanges()" onblur="watchChanges()" type="text" /><select id="fromSystem" onchange="convert()"> <option value="mm">millimeters</option> <option selected="selected" value="cm">centimeters</option> <option value="m">meters</option> <option value="foot">feet</option> <option value="inch">inches</option> </select></td>
</tr>
<tr>
<td colspan="1" align="center">=</td>
</tr>
<tr>
<td><input id="toVal" style="width: 100px;" type="text" disabled="disabled" /><select id="toSystem" onchange="convert()"> <option value="mm">millimeters</option> <option value="cm">centimeters</option> <option value="m">meters</option> <option selected="selected" value="foot">feet</option> <option value="inch">inches</option> </select></td>

How can I call a PHP Function inside a Javascript Function? This is what I have so far, but I don't think I'm doing it the right way.
Any suggestions?

PHP Code:
<?php
function phpQuery(){

     $query = mysql_query("INSERT INTO mytable VALUES('','name','email')");

}
?>
<script type="text/javascript">
function delayQueries()
{
  timeoutID = window.setTimeout(doQueries, 2000);
}

function doQueries()
{
  var runQuery = "<?php phpQuery(); ?>";    
}
</script>

Hi,

I am working on a google map where you can show lines on the map by checking checkboxes. Lines are displayed according to their category attribute in the xml file. The function that picks up the checkbox click is like this:
Code:

 function boxclick(box,category) {
        if (box.checked) {
          show(category);
        } else {
          hide(category);
        }

Another part of the code assigns that category attribute to arrows, so that when a line of "x" category is displayed, the relevant arrows are displayed along with it, to indicate directionality.

I also have a select list which displays the lines by looping through their array and using selectedIndex in a function called handleSelected2. But I can't get the arrows to display along with the lines from the select box. After trying many, many things, I figure that all I need to do is to call the show(category) function from inside the handleSelected2 function and it should all come together. So I came up with this:

Code:

function handleSelected2(opt,category) {     
  for (var h = 0; h <gpolylines.length; h++) {
		  gpolylines[h].hide();
        }
         h = opt.selectedIndex - 1; 
        if (h > -1) {
          gpolylines[h].show();
		 }
		 for (var v=0; v<pts.length; v++) { 
		 show(category); 
		   }
}

which gets me lines, but no arrows. You can see it sort of working he
http://www.xelawho.com/map/zonesarrowstest.htm

I figure I've got to be close, because if I just tell it to show all the arrows (without going through the category filter) like this:

Code:

function handleSelected2(opt,category) {     
  for (var h = 0; h <gpolylines.length; h++) {
		  gpolylines[h].hide();
        }
        var h = opt.selectedIndex - 1; 
        if (h > -1) {
          gpolylines[h].show();
		  }
       for (var i=0; i<pts.length; i++) {
		 pts[i].show();
        }
    }

then all the arrows show up, as you can see he http://www.xelawho.com/map/zonesarrowstest2.htm

I'm not getting any error messages and I've tried pretty much everything I can think of... I've been tweaking this for days and it's driving me crazy. Does anybody else have any ideas?

Thanks in advance.

I would like to call a function within a function. Is this even possible??
When I do this I get "undefined"

Here's my code:
Code:

<html>
<head>
<script type="text/javascript">
function product(a,b){
   total = a*b;
   display(total);
}

function display(num){
   return num;
}
</script>
</head>

<body>
<h1>This text I do NOT want to be erased.</h1>

<a href="http://google.com" target="_blank">Total: </a>
<script type="text/javascript">
product(3,4);
document.write(display());
</script>

</body>
</html>

I know you can just return in the first function, "product()" but I would like to do something else in my second function "display()" then return a value.

thanks

I need to create a form button named Create Resume. When clicked this button should call a function that generates a new Web page displaying a resume based on the user input. I am supposed to use the document.write() method to populate a newly generated Web page with all of the XHTML elements, formatting and variable values needed to produce the desired output in Web (.htm) format.

I was hoping to get some guidance on how to accomplish this final step on my project. Any help would be greatly appreciated!

KM





<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Web 115 Final Project</title>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />

</head>

<body>
<script type="text/javascript" src="projectjs.js">
</script>
<hr align="center" width="60%" />
</br>
<script type="text/javascript">
document.write("<span style=\"font-family:garamond; text-align:center;font-size:

30px;\"> <p><b>Build Your Resume</b></p><\/span>");
</script>

<form name="resume" method="get">
<p><input type="text" value="Enter your full name" size="50"/>
</p><p>
<input type="text" value="Enter your address" size="150"/>
</p><p>
<input type="text" value="Enter your phone number" size="50"/>
</p><p>
<input type="text" value="Enter your e-mail address" size="50"/>
</p>
<script language = "Javascript">
function echeck(str) {

var at="@"
var dot="."
var lat=str.indexOf(at)
var lstr=str.length
var ldot=str.indexOf(dot)
if (str.indexOf(at)==-1){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)

==lstr){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)

==lstr){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(at,(lat+1))!=-1){
alert("Invalid E-mail ID")
return false
}

if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(dot,(lat+2))==-1){
alert("Invalid E-mail ID")
return false
}

if (str.indexOf(" ")!=-1){
alert("Invalid E-mail ID")
return false
}

return true
}

function ValidateForm(){
var emailID=document.resume

if ((emailID.value==null)||(emailID.value=="")){
alert("Please Enter your Email ID")
emailID.focus()
return false
}
if (echeck(emailID.value)==false){
emailID.value=""
emailID.focus()
return false
}
return true
}
</script>
<p>
<textarea id="tarea" cols="75" rows="4">Enter your personal information

</textarea></p><p>
<textarea id="tarea" cols="75" rows="4">Enter your career objectives

</textarea></p><p>
<textarea id="tarea" cols="75" rows="4">Enter your educational background

</textarea></p><p>
<input type="text" value="Most recent employment beginning and ending dates"

size="50"/></p><p>
<textarea id="tarea" cols="75" rows="4">Most recent employment experience</textarea>

</p><p>
<input type="text" value="Employment beginning and ending dates" size="50"/></p><p>
<textarea id="tarea" cols="75" rows="4">Additional Employment

Experience</textarea></p><p>
<input type="text" value="Employment beginning and ending dates" size="50"/></p><p>
<textarea id="tarea" cols="75" rows="4">Additional Employment

Experience</textarea></p><p>
<input type="text" value="Employment beginning and ending dates" size="50"/></p><p>
<textarea id="tarea" cols="75" rows="4">Additional Employment

Experience</textarea></p><p>
<textarea id="tarea" cols="75" rows="4">Character References</textarea></p><p>
<textarea id="tarea" cols="75" rows="4">Business References</textarea></p></br>
<input type="button" name="push_button" value="Create Resume"/>
</form>

</body>
</html>