checkboxes and javascripts in .net

[rathiagu]

i have a checkbox
[HTML]<input name="AllCompanies" id="Checkbox3" type="checkbox" onclick=chkall1() checked/>All Companies
[/HTML]On this onclick I have called the below javascript

function chkall1()
{
if(document.getElementById("Checkbox3").checked=true)
{
document.getElementById("Checkbox3").checked=false;
for (var n=0; n < document.forms[3].length; n++)
{
if (document.forms[3].elements[n].type=='checkbox' && document.forms[3].elements[n].id!='Checkbox3')
{
document.forms[3].elements[n].checked=false;
document.forms[3].elements[n].disabled=false;
}
}
}
else
{
document.getElementById("Checkbox4").checked=true;
for (var n=0; n < document.forms[3].length; n++)
{
if (document.forms[3].elements[n].type=='checkbox' && document.forms[3].elements[n].id!='Checkbox4')
{
document.forms[3].elements[n].checked=true;
document.forms[3].elements[n].disabled=true;
}
}
}
return false;
}

When I execute this the output is
The all companies check box is checked in the output.

Now the thing I need is when I click on the checked all companies checkbox it must be unchecked and all the checkboxes below this checkbox must be enabled and checked.for this I have written the javascript. When I click it for second time I need the checkbox to be checked for which I have written the else part in javascript and it doesnot work.it works for only one click

[kestrel]

Hey rathiagu, Welcome To The Scripts!
Im going to move this question to the Javascript forum. Have a nice day!

--
Kestrel

[acoder]

Please use CODE tags when posting code.

On line 3, you're setting instead of checking the checked property, i.e. you need double equals (==) instead of single (=).