var sFullQueryString = null;
var arrParameters = null;

function GetQueryString(pName)
{
 
	var value = '';
	
	if(sFullQueryString == null)
	{
		sFullQueryString = GetQueryStringFull();
	}
	
	if(arrParameters == null)
	{
		arrParameters = sFullQueryString.split('&');
	}
	
	for(var i = 0; i < arrParameters.length; i++)
	{
		var parameter = arrParameters[i];
		
		var exist = parameter.indexOf(pName);
		if(exist != -1)
		{
			var arrTmp = parameter.split('=');
			
			if(arrTmp != null)
			{
				if(arrTmp.length == 2)
				{
					value = arrTmp[1];
					return value;
				}
				else
				{
					value = '';
				}
			}
			else
			{
				value = '';
			}
		}
		else 
		{
			value = '';
		}
	}
	
	return value
	
}

function GetQueryStringFull()
{
	return window.location.href.substring((window.location.href.indexOf('?') + 1));;
}