function addBike(form)
{
	var fl=form.cmbBike.length-1;
	var au=form.cmbBikes.length-1;	
	var users='x';
	for(au;au>-1;au--)
	{
		users=users+','+form.cmbBikes.options[au].value+','
	}
	for(fl;fl>-1;fl--)
	{
		if(form.cmbBike.options[fl].selected&&users.indexOf(','+form.cmbBike.options[fl].value+',')==-1)
		{
			t=form.cmbBikes.length;
			opt=new Option(form.cmbBike.options[fl].text,form.cmbBike.options[fl].value);
			form.bikes.value+='%'+form.cmbBike.options[fl].value+'%;';
			form.cmbBikes.options[t]=opt
		}
	}
}

function removeBike(form)
{
	fl=form.cmbBikes.length-1;
	for(fl;fl>-1;fl--)
	{
		if(form.cmbBikes.options[fl].selected)
		{
			var selValue=form.cmbBikes.options[fl].value;
			var re='%'+selValue+'%;';
			var hiddenValue=form.bikes.value;			
			if(hiddenValue)
			{										
				hiddenValue=hiddenValue.replace(re,'');					
				form.bikes.value=hiddenValue;
				form.cmbBikes.options[fl]=null;
			}						
		}
	}
}