Get URL to Hash

[treeleaf20]

All,

If I have the following URL:

 

http://example.com/viewpage.php?id=test

 

Then when I write a hash the URL goes to:

 

http://example.com/viewpage.php?id=test#id=nexttest

 

I have the following code:

function redirectHash()
{
var hash = location.hash;
if (hash){
	hash = hash.replace('#', '');
	location.href = hash;
}
}
</script>

Currently this code would try and redirect me to http://example.com/id=nexttest

 

How can I get it so that it keeps everything before the ? and just updates the id part?

 

Thanks in advance.

[treeleaf20]

Also I have that and then call this function when the page loads in the body onload command. It will load the original page and then switch the url and load it again. How can I get it so that it does the url and then load the page?