function bkcheck(vbk){
	bkck = 0;
	if (vbk!=0){
		for (i=1;i<=document.find.bk.length-1;i++)
			if (document.find.bk[i].checked){
				bkck = bkck + 1;
				document.find.bk[0].checked = false;
			}
		
		if (bkck == 0 || bkck == 6){
			document.find.bk[0].checked = true;
			for (i=1;i<=document.find.bk.length-1;i++)
				document.find.bk[i].checked = false;
			}
	}
	else{
		if (document.find.bk[0].checked){
			for (i=1;i<=document.find.bk.length-1;i++)
				document.find.bk[i].checked = false;
		}
		else{
			document.find.bk[1].checked = true;
		}
	}
}

function bkname(vbk){
	if (document.find.bk[vbk].checked)
		document.find.bk[vbk].checked = false;
	else
		document.find.bk[vbk].checked = true;

	bkcheck(document.find.bk[vbk].value);
}

function lncheck(vln){
	lnck = 0;
	if (vln!=0){
		for (i=1;i<=find.ln.length-1;i++)
			if (find.ln[i].checked){
				lnck = lnck + 1;
				find.ln[0].checked = false;
			}
		
		if (lnck == 0 || lnck == 3){
			find.ln[0].checked = true;
			for (i=1;i<=find.ln.length-1;i++)
				find.ln[i].checked = false;
			}
	}
	else{
		if (find.ln[0].checked){
			for (i=1;i<=find.ln.length-1;i++)
				find.ln[i].checked = false;
		}
		else{
			find.ln[1].checked = true;
		}
	}
}

function lnname(vln){
	if (find.ln[vln].checked)
		find.ln[vln].checked = false;
	else
		find.ln[vln].checked = true;

	lncheck(find.ln[vln].value);
}

function cpcheck(vcp){
	cpck = 0;
	if (vcp!=0){
		for (i=1;i<=find.cp.length-1;i++)
			if (find.cp[i].checked){
				cpck = cpck + 1;
				find.cp[0].checked = false;
			}
		
		if (cpck == 0 || cpck == find.cp.length-1){
			find.cp[0].checked = true;
			for (i=1;i<=find.cp.length-1;i++)
				find.cp[i].checked = false;
			}
	}
	else{
		if (find.cp[0].checked){
			for (i=1;i<=find.cp.length-1;i++)
				find.cp[i].checked = false;
		}
		else{
			find.cp[1].checked = true;
		}
	}
}

function cpname(vcp){
	if (find.cp[vcp].checked)
		find.cp[vcp].checked = false;
	else
		find.cp[vcp].checked = true;

	cpcheck(find.cp[vcp].value);
}

function enter(){
	if (event.keyCode==13){
		send();
	}
}