function updBpUrl() {
	document.getElementById('bphtml').value = '<script language="javascript" src="http://zeirishi-community.com/blogparts/bpjs.php?c=' + getBpParam() + '" charset="Shift_JIS"></script>';
	document.getElementById('jspreview').src = "blogparts/bpjs.php?m=dom&c=" + getBpParam();
}

function getBpParam() {
	param = document.getElementById('cl_bg1').value.substr(1)
	        + document.getElementById('cl_bg2').value.substr(1)
	        + document.getElementById('cl_tx1').value.substr(1)
	        + document.getElementById('cl_tx2').value.substr(1);
	return param;
}