<INPUT TYPE=text ID=oBox1 value=40>The sum of the values in these two text boxes determines the width <BR><INPUT TYPE=text ID=oBox2 value=40>of the blue text box below.
<BR><INPUT TYPE=text ID=oBox3 STYLE="background-color:blue">
<BR><BR><INPUT TYPE=button ID=Button1
value="Step 1: Get expression" >
<INPUT TYPE=button ID=Button2 value="Step 2: Remove expression"
>
<INPUT TYPE=button ID=Button3 value="Step 3: Get expression again"
>
<BR>
<HR>
<BR>
Right-click anywhere on this page to view the source code.
<SCRIPT>
var s;
var b;
oBox3.style.setExpression("width","eval(oBox1.value) +
eval(oBox2.value)","jscript");
function getexp()
{
s=oBox3.style.getExpression("width");
alert("Expression for the width of the blue box is \n\n" + s +
"\n\nThe width property has a value of " + oBox3.style.width);
}
function remexp()
{
b = oBox3.style.removeExpression("width");
alert("Expression removed successfully? \n" + b);
}
</SCRIPT>