function toggleLayer(whichLayer)
{
	if (document.getElementById)
	{
	// this is the way the standards work
	var style2 = document.getElementById(whichLayer).style;
	style2.display = style2.display? "":"block";
	}
	else if (document.all)
	{
	// this is the way old msie versions work
	var style2 = document.all[whichLayer].style;
	style2.display = style2.display? "":"block";
	}
	else if (document.layers)
	{
	// this is the way nn4 works
	var style2 = document.layers[whichLayer].style;
	style2.display = style2.display? "":"block";
	}
}
function toggleLayer2(whichLayer)
{
	if (document.getElementById)
	{
	// this is the way the standards work
	var style2 = document.getElementById(whichLayer).style;
	style2.display = style2.display? "":"none";
	}
	else if (document.all)
	{
	// this is the way old msie versions work
	var style2 = document.all[whichLayer].style;
	style2.display = style2.display? "":"none";
	}
	else if (document.layers)
	{
	// this is the way nn4 works
	var style2 = document.layers[whichLayer].style;
	style2.display = style2.display? "":"none";
	}
}

function showdistrictlist()
{
	var select=document.getElementById('choosedistrict');
	value=select.options[select.selectedIndex].value;
	
	var district = new Array('ECR','CCR','WCR','BCR','BCD','CMWD','CBD','FLD','HUUD','JPD','MBD','MNYD','NHVTD','NED','MDD','PCD','PNWD','PSWD','PSD','SWD','STLD','TJD','MSD','OMD')
	
	for (i=0;i<district.length;i++)
	{

	
		if (value == district[i]) {

			document.getElementById(district[i]).style.display='block';
		}
		else 
		{
			document.getElementById(district[i]).style.display='none';
		}
	}	
	
	

}