Pass More Than One Variable In Url?

Sep 29, 2010

I am developing application in which i use ajax.but i need to pass more than one variable to url for further processing. I can't use

var url="availabilitycheck.php?t="+value //it works
var url="availabilitycheck.php?t="+value+"&hid="+hd1+"&chkin="+chkin; //not valid

How can i send other variables.?? I tried using session that works but it does not work when i integrated it to joomla. So is there any way to pass more variable in url as querystring?

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[Code]....

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