libraries/tbs/plugins/tbs_plugin_opentbs.php
function TbsMergeVarFields($PrmVal, $FldVal) {
		$this->TBS->meth_Merge_AutoVar($PrmVal, true);
		$PrmVal = str_replace($this->TBS->_ChrVal, $FldVal, $PrmVal);
		return $PrmVal;
	}
function TbsMergeVarFields($PrmVal, $FldVal) {
		$this->TBS->meth_Merge_AutoVar($PrmVal, true);
		$PrmVal = str_replace($this->TBS->_ChrVal, $FldVal, $PrmVal);
		return $PrmVal;
	}
Replace var fields in a Parameter of a block.
@param  string $PrmVal The parameter value.
@param  string $FldVal The value of the field that holds the value.
@return string The merged value of the parameter.