function replaceQueryString(url,param,value) 
{	
	var re = new RegExp("([?|&])" + param + "=.*?(&|$)","i");	
	if (url.match(re))
		return url.replace(re,'$1' + param + "=" + value + '$2');
	else if (url.indexOf("?") == -1)
		return url + '?' + param + "=" + value;
	else
		return url + '&' + param + "=" + value;
}
function islocationselected()
{
	if ( document.getElementById('location').value > 0 ) 
		return true;
	else
	{
		alert("Please select S & H location.");	
		return false;
	}
}
String.prototype.trim = function() {  return this.replace(/^\s+|\s+$/g, '');  }